Leonardo DiCaprio teamed up with Christie's to co-host the 11th Hour Auction in NYC last night. It was a successful event for Leo since the auction reportedly raised $35 million to benefit environmental and wildlife conservation efforts, almost doubling the goal of $18 million. He had the support of his long-time friend and Great Gatsbyco-star Tobey Maguire, who put in a winning bid on one of 33 pieces of contemporary art. Leo contributed something from his own art collection, a print called "Ocean V" by well-known photographer Andreas Gursky. Also out for the evening were Bradley Cooper, Mark Ruffalo and Salma Hayek.

It was Leonardo's second art-inspired outing in as many days, since he also made an appearance at the Brant Foundation Art Study Center's Andy Warhol showing in Greenwich, Connecticut, on Sunday. He'll be switching gears from art to film in the coming days, though, when he debuts The Great Gatsby in Cannes later this week.

Leonardo DiCaprio teamed up with Christie's to cohost the 11th Hour Auction in NYC last night. It was a successful event for Leo since the auction reportedly raised $35 million to benefit environmental and wildlife conservation efforts, almost doubling the goal of $18 million. He had the support of his longtime friend and Great Gatsby costar Tobey Maguire, who put in a winning bid on one of 33 pieces of contemporary art. Leo contributed something from his own art collection, a print called "Ocean V" by well-known photographer Andreas Gursky. Also out for the evening were Bradley Cooper, Mark Ruffalo, and Salma Hayek.

It was Leonardo's second art-inspired outing in as many days, since he also made an appearance at the Brant Foundation Art Study Center's Andy Warhol showing in Greenwich, CT, on Sunday. He'll be switching gears from art to film in the coming days, though, when he debuts The Great Gatsby in Cannes later this week.

Reese Witherspoon made a smiley arrival at NYC's JFK airport with her husband, Jim Toth, last night. Reese is back to blond after she debuted her newly dyed locks at her son Deacon's soccer game in Brentwood on Saturday. She was previously sporting a darker 'do for her role in the upcoming film The Good Lie, which she filmed in Atlanta over the past month. During her stay in Georgia, Reese got into legal trouble when she was arrested for disorderly conduct while Jim was charged with a DUI. The duo seem to be moving on from the drama, though, and are getting back to their busy schedules, including their current East Coast trip.

Bradley Cooper dressed up in a suit for a visit to Late Night With Jimmy Fallon yesterday in NYC. While promoting the finale of his Hangover trilogy, The Hangover Part III, which hits theaters next Thursday, May 23, Bradley also got into a competitive game of what host Jimmy branded "faceketball." He strapped a mini basketball hoop to his head and geared up for the challenge by shedding his jacket and telling Jimmy to do the same, saying, "Jackets off, bro!" He also spoke about his Oscar nomination as well as former and current costar Jennifer Lawrence during the stop. "She's the best and we're doing a movie right now and she plays a sick character, I mean sick like from the Bronx, and she just kills it."

It was a busy start to the week for Bradley, who engaged in a bit of charitable bidding that same day. Bradley attended Leonardo DiCaprio's Christie's art auction, which benefited Leo's foundation supporting environmental protection and conservation efforts. He wasn't the only star in attendance as he was joined by Tobey Maguire, Salma Hayek, and Mark Ruffalo for the auction.

Jennifer Aniston and Justin Theroux shopped for furniture on NYC's Upper East Side today. The retail stop comes after a busy Big Apple weekend for the pair. Yesterday, Jennifer and Justin had brunch at the famed Fred's restaurant in Barneys department store, and on Saturday night, the couple indulged in a sushi dinner at Nobu with friends.

While Jen has been able to spend time with Justin on the East Coast, she's also had her fair share of solo outings. On Friday, Jen took in Bette Midler's Broadway show I'll Eat You Last with a group of pals followed by dinner at Trattoria Dell'Arte restaurant.

Jennifer Lawrence wore an all-black ensemble to catch a flight out of LAX yesterday. She was reportedly headed to Montreal to begin filming for her latest project, X-Men: Days of Future Past. Jennifer's on the go again after taking a trip last week to NYC, where she donned a Dior gown to make her debut trip up the stairs at the Met Gala. Also in attendance at the fashionable event was her ex-boyfriend Nicholas Hoult, who was joined by his rumored new girlfriend, Riley Keough. There was no drama between Jennifer and Nicholas, though, since he shared on the red carpet that they are "friends." It looks like their new relationship status will help them professionally as well since they'll soon reunite on the set of the latest X-Men installment.

Victoria Beckham wore a sleeveless coat of her own design to make stops at Barneys and Prada on Saturday in NYC. She's been spending the last few days shopping around the Big Apple, including a visit to Bergdorf Goodman on Friday. Victoria poked fun at herself by posting a picture from that retail run on Twitter with a photoshopped arrow to her mouth reading, "Look, I'm smiling!" She had plenty to smile about since it was Mother's Day weekend, and she tweeted a special message to her followers, writing, "Happy Mother's Day fashion bunnies!" — click into the gallery to see the funny snap!

Victoria was without her kids in the days leading up to the holiday, though she already celebrated with her family in March, when the UK marks its version of Mother's Day. Despite being solo on the East Coast, Victoria kept busy in between boutique visits with a visit to the Metropolitan Museum of Art's Punk: Chaos to Couture exhibit.

Natalie Portman and her son, Aleph, visited a friend's home in LA on Friday. Natalie got to spend quality time with her almost 2-year-old boy ahead of Mother's Day yesterday. While Alpeh was the main man in her life on Friday, news recently broke that she has been assigned a new leading man on the big screen. Natalie is set to star in Jane Got a Gun, which is off to a troubled start, since both Jude Law and Bradley Cooper had already committed to playing the male lead, then decided drop out. It has been announced that Ewan McGregor is now in negotiations to take over.

Jane Got a Gun is not the only project in which Natalie has a hot costar lined up. She is also set to star as Lady Macbeth in the big-screen adaptation of William Shakespeare's Macbeth opposite Michael Fassbender. The film will be Natalie and Michael's second collaboration after the duo recently wrapped a Terrence Malick flick.

Today is Robert Pattinson's 27th birthday! Rob has been on the Hollywood scene for years now, thanks to his run as Edward Cullen in the Twilight Saga films. But his good looks go back even further to his days as a young model and actor with parts in movies such as Harry Potter and the Goblet of Fire. On his birthday, we could have rounded up 27 adorable photos, but instead, we're presenting more than 100. Happy birthday to Rob — and click through to see his hottest photos!

This week, POPSUGARTV got in on the Great Gatsby fun with a how-to on throwing a great '20s party. We also perfected the art of making a stylish holey t-shirt and looked ahead to Summer days with a 10-minute bikini tone-up. The Office's Angela Kinsey got tearful chatting with us about the show's finale, and gold medalist Gabby Douglas talked about her plans to return to the Olympics.

Click through to watch all these videos and visit POPSUGARTV for even more!

It was a busy week for stars, between red carpet affairs and work on the set. Robert Pattinson made a secret trip to NYC to join his girlfriend, Kristen Stewart, while Beyoncé Knowles took over the Met Gala stairs in the Big Apple. Anne Hathaway showed off her platinum-blond hair at an artists' dinner with Sarah Jessica Parker, and Jennifer Aniston had a laugh with her hairstylist, Chris McMillan, while promoting her new web series for Living Proof in NYC.

That's not all the fun to go down this week — click through the rest of the sweet snaps!

Kate Upton got sexy in a swimsuit for the cover of the June issue of US Vogue. The go-to cover girl for the Sports Illustrated Swimsuit Edition is making waves in more than just modeling. Along with making her debut on American Vogue, she is taking her talents to the big screen. Kate is currently filming The Other Woman alongside Cameron Diaz and Leslie Mann in NYC. She's known for her figure, but has also faced criticism for her curvaceous physique. In the magazine, she addresses her critics and also reveals her confidence, opening up about loving her body, growing into her figure in her native Florida, as well as her next career moves. Here is more from Kate Upton in Vogue:

• On criticism over her figure: "It was hard at first. You sit there and you're like 'Is something wrong with me?' The things that they're rejecting are things that I can't change. I can't change my bra size. They're natural! I can work out and I can stay healthy and motivated, but I can't change some things. I really just live my life. I love my body. It's what God gave me! I feel confident with myself, and if that inspires other women to feel confident with their bodies, great."
• On feeling comfortable with her body growing up: "In Miami, boobs are fantastic. I was so proud of them. I was so excited. Are you kidding? I'm in Florida, and I'm constantly in bikinis. I was like, 'Yes! Killing it! All the girls on the beach are gonna be so jealous!'"
• On making it big: "If I'm going to make it as a model, I've got to be a celebrity. My work seems to be my priority at this point in my life. I never set out to be on the runway. I feel like I trust my career path. Acting I'm very interested in. I'm American — more is more!"

Emily Blunt and John Krasinski made a smiley arrival at LAX together yesterday. The couple touched down in LA while holding hands after a busy stay in NYC. John accompanied a Carolina Herrera-clad Emily to Monday night's Met Gala along with a plethora of other A-listers. His trip to the East Coast was not just about fashion, as he was also promoting the final episode of The Office, which airs on May 16.

As part of his promo tour, John made a stop on Late Night With Jimmy Fallon, which involved him in a hilarious lip-syncing battle with the host. He performed Katy Perry's "Teenage Dream" and had a good time doing it. He wrote on his Twitter account, "Oh my Lord! Had the best time ever with Jimmy Fallon tonight!"