Tiger Woods and his girlfriend, Lindsey Vonn, kicked off the week with a relaxing afternoon on the water in Palm Beach. On Tuesday, the duo went boating on Tiger's yacht, Solitude, with his kids, Charlie and Sam. Tiger lounged shirtless while he fished off the side of the vessel, and Lindsey was spotted snapping pictures from the dock in her bikini. The couple are back to Tiger's home base in Florida after traveling to NYC to attend the Met Gala earlier this month. Tiger will be on the go again soon, though, since he's set to host his annual Tiger Jam charity poker tournament in Las Vegas this Friday and Saturday.

Tiger and Lindsey have been going strong since revealing their relationship in March and have showed mutual support for each other publicly. Lindsey's had Tiger by her side as she recovers from the knee injury she sustained during the skiing world championships in Austria in February, and she cheered him on during the Masters last month.

Nina Dobrev and Ian Somerhalder were both in attendance at today's CW upfronts presentation in NYC. Nina and Ian walked the red carpet separately but during the event they shared the same stage even after news of their split was announced earlier this month. They were together for three years, though they became one of the many TV costar couples that couldn't make it work off screen when they called it quits.

Nina and Ian are in the Big Apple on behalf of The Vampire Diaries, which will air its season finale tonight — make sure to tune in for our LIVE Vampire Diaries viewing party tonight at 4:30 p.m. PDT/7:30 p.m. EDT.

David Beckham had a smile on his face as he left the Paris Saint-Germain training facilities in Paris today. It was one of the last times he'll be visiting the field since earlier today he announced his plans to retire at the end of the season. David's been in the soccer spotlight since he was 14, and he'll wrap up his successful career in his final game with PSG later this month. We'll certainly miss seeing David on the field, especially since he had a hot habit of going shirtless. Hopefully this weekend's match will provide one last glimpse at his abs — and a whole lot of cuteness in the stands from his adoring family.

It was a big night in France as the Cannes Film Festival kicked off with the opening ceremony and the premiere of The Great Gatsby! Leonardo DiCaprio, Carey Mulligan, Joel Edgerton, Isla Fisher, and Tobey Maguire all hit the red carpet after dressing up for a photocall to promote their film, which is at the festival out of competition, earlier today. Cindy Crawford also showed her support in a white Roberto Cavalli gown while Julianne Moore, Freida Pinto, and juror Nicole Kidman walked the red carpet as well — make sure to check out all the glamorous looks from the Great Gatsby premiere.

They aren't the only stars descending on the French Riviera, since Justin Timberlake, Christoph Waltz, Kirsten Dunst, and others have already arrived to take part in the film festival fun. With so many A-listers in one spot, it's hard to choose a favorite — but we're asking you to do just that in our POPSUGAR 100 bracket! Play now for the chance to win a Victoria Beckham handbag.

Angelina Jolie surprised many today, when she revealed her decision to undergo a preventive double mastectomy in an op-ed for The New York Times. She shared her brave story with the world in the hopes that she would empower women to take control of their own health. This isn't the first time Angelina's public choices have inspired others, with her philanthropic work and involvement with the UNHCR among the many ways she makes her mark on the world. Read on for more powerful moments from Angelina.

The honeymoon continued for Keira Knightley and her new husband, James Righton, in Corsica today. Keira wore a bikini for a dip in the ocean, though she's showed off other looks with her laid-back honeymoon style, which has even included wearing the same dress three different ways! For her dressed-down swim, she was joined by shirtless James, who showered her with kisses in the water. They've been all about the sweet PDA during their romantic getaway and showed similar affection while enjoying lunch and strolling the beach last week.

Keira and James jetted off to France after tying the knot on May 4. They were wed at the town hall in Mazan and celebrated after the ceremony with friends and family at a reception held at her parents' farmhouse.

It was an extraspecial weekend for Anna Paquin and her family since it was her first time celebrating Mother's Day! They got a head start on the fun on Saturday, when they met up with friends for a party at a Malibu park. Anna and her husband, Stephen Moyer, took turns holding onto their boy and girl twins, whose names have not been revealed, and mingling with guests. The babies were born in September and since then have joined their parents for shopping trips and strolls along Venice Beach, though their sweet faces have been kept mostly under wraps. It hasn't been all about parenthood for Anna and Stephen, though, since they've also been working on the sixth season of True Blood. The series doesn't return until June 16, but you can check out pictures from True Blood season six now to gear up for the next installment!

Hilary Duff escaped to Mexico with her family over the weekend to celebrate Mother's Day. She had husband Mike Comrie, son Luca, and sister Haylie along for the celebratory trip, which she recognized on Twitter, writing, "Feel so very lucky to be a mother today! And everyday! Happy Mother's Day to all the mothers out there, it can be a hard job but the best! Good work!" Hilary also shared her thoughts on motherhood with People recently, adding that, "I think asking for help on a tired day isn't a sign of weakness. A lot of changes have come into your life quickly and it's important to take time for yourself!"

Hilary wore a bikini during the sunny days, which included hanging out poolside, hitting the beach, and kicking a ball around the grass. Hilary is just one of the many famous moms who celebrated Mother's Day in a special way including Jessica Alba, who went out to brunch with her family of four.

Robert Pattinson and Kristen Stewart checked out of their NYC hotel, hopped into a waiting car, and headed to JFK to catch a flight Wednesday. They didn't go straight to the airport, though — their driver stopped en route to pick them up a few slices of pizza!

Although they were both in the Big Apple, Kristen attended the Met Gala on Monday night without Rob by her side. He missed out on a fun evening with friends since Tom Sturridge and Sienna Miller were also at the bash and ended up leaving with Kristen. They weren't the only famous pals that Kristen spent time with — she arrived with Cameron Diaz and Stella McCartney! Both Kristen and Cameron were decked out in looks by the designer, with Kristen in a lace-embroidered jumpsuit and Cameron in a cobalt-blue caped dress.

The NYC visit wasn't all about the red carpet for Kristen, since she reportedly also checked out a performance of Orphans, which Tom stars in, on Broadway. Rob was also rumored to have been in the audience during a recent, but separate, showing.

Don't forget — Rob and Kristen are both in our POPSUGAR 100 bracket, so make sure to play for your chance to win a Victoria Beckham handbag!

Jennifer Aniston went casual in cargos, flip-flops, and her Tom Ford bag to shop Madison Avenue in NYC yesterday. She's on the East Coast promoting her new Living Proof web series, Good Hair Day, and attended a launch event for the show Wednesday. Jennifer was joined by her hairstylist Chris McMillan for the press day, during which she talked about learning "what not to do" with her hair after cutting it off in her teens. Jennifer also revealed that she loves Kate Moss and Gisele Bündchen's looks, though she might be taking on a different style soon — Chris shared that Jennifer "wants to do a drastic look for" an upcoming role. He's not the only person on Jennifer's team who's talking about her lately, since her yoga teacher Mandy Ingber recently told us that Jennifer is an "amazing, positive force."

If you're a fan of Jennifer, then make sure to vote for her in our POPSUGAR 100 contest for the chance to win a Victoria Beckham handbag!

Gwyneth Paltrow carried a Céline bag and sported Isabel Marant sneakers and a white IRO leather jacket yesterday when she stepped out in NYC. It's been a whirlwind week so far for the star, who kicked things off at the Met Gala on Monday. Gwyneth wore a pink Valentino gown for the annual fashion event, which she attended with her husband, Chris Martin. On Tuesday, Gwyneth was back in the spotlight for a visit to the SoHo Apple store, where she and her pal Jessica Seinfeld participated in an hour-long Q&A about the new Goop City Guides app. Gwyneth revealed that her daily routine includes writing and researching for Goop while her children, Apple and Moses, are at school. She practiced what she preaches yesterday, wearing an Up by Jawbone wristband after it was featured in Goop last month.

During the chat, Gwyneth also joked that the highlight of her Met Gala night was "going home and taking my shoes off" and spoke about her love for public transportation. Gwyneth said she "rides the subway in London all the time" but that "the last time I rode the subway in New York was a year-and-a-half ago."

The glamorous — and long — red carpet at the Met Gala gives stars the chance to make grand entrances as they head inside the Metropolitan Museum of Art for the annual Costume Institute Benefit. Once inside, though, it's all about mixing and mingling for the famous faces, and Monday night brought just that. Jennifer Lopez cozied up to fellow songstress Gwen Stefani while Beyoncé Knowles greeted Gavin Rossdale with a kiss. Emily Blunt and Anne Hathaway teamed up next to designer Tom Ford, and Olivia Wilde and Katie Holmes shared a table with Calvin Klein's Francisco Costa. There are lots more celebrity snaps from inside the big bash — click through to see them all!

Zac Efron unbuttoned his shirt and showed off his six-pack while filming Townies in LA yesterday. He got into the sports scenes with a few props including a basketball and baseball bat, but the real focus was on his tanned abs. Zac's been busy filming the college-set comedy since March, though his scenes haven't been all hard work. Zac kissed a costar during one rowdy take last month and has also sported a bathrobe and other costumes for the cameras. He did take a break from the on-set fun to promote a more serious project, At Any Price, at the Tribeca Film Festival after debuting the movie at the Venice Film Festival last year.

Diane Kruger and Joshua Jackson gathered around a fan for a candid snap in the East Village yesterday following lunch with friends. The couple spent a dressed-down day around the Big Apple after getting glam for the Met Gala on Monday night. Josh and Diane were one of the evening's sexiest duos, and Josh made waves of his own as one of the Met Gala's hottest guys. He also stole the spotlight in a hilarious photobomb of Anne Hathaway — check out that and other awesome moments in our roundup of GIFs from the Met Gala! Diane has since wrapped up her East Coast trip and landed at LAX solo early this morning.

Blake Lively rocked thigh-high boots and a fitted dress for a photo shoot in NYC today. She modeled four additional looks during her day in front of the cameras, which she's no stranger to after attending the Met Gala on Monday night. Blake chose a strapless Gucci gown for her turn on the fashionable red carpet that included A-listers like Beyoncé, Gisele Bündchen, and Gwyneth Paltrow. Blake took a break from the annual event last year, when she escaped to Vancouver for a getaway with then-boyfriend Ryan Reynolds instead.

Malin Akerman posted the first picture of her son, Sebastian Zincone, on her Instagram account yesterday. She added the caption, "Did my hair today and this was my son's reaction... I think he likes it ;)" Malin gave birth to Sebastian in April and she's since been laying low near home with her new family of three. She did step out last weekend, though, and was photographed for the first time since welcoming her baby boy. Make sure to check out all the other famous official first baby photos through the years!

When the biggest names in Hollywood, music, and fashion get together, there are bound to be some friendly matchups, and that's just what happened at 2013's Costume Institute Benefit on Monday. Stars mingled with their famous friends, walked the carpet with their designing pals, and brought their significant others to celebrate the Punk: Chaos to Couture exhibit at the Metropolitan Museum of Art. Go ahead and check out the fun duos at the Met Gala, including Jennifer Lawrence's Hunger Games reunion with Elizabeth Banks and Nicole Richie's run-in with Julianne Hough and Jaime King.