This week on Twitter, celebs shared their candid moments of work and play. Nicole Richie played dress-up during her appearance on Watch What Happens Live, sporting a suit and tie just like host Andy Cohen. We also saw Alessandra Ambrosio showing off her baby bump in a chic neon sweater, Kate Upton trying out a voluminous new 'do, and Alexa Chung sharing some very eye-catching nail art. It's all Read more

Sports Illustrated's Kate Upton posed with her illustrious new magazine cover at Las Vegas's Pure Nightclub yesterday. She's the lucky lady fronting the annual Swimsuit Edition, following in the footsteps of last year's model Irina Shayk. The winner was revealed Monday, when Kate's sexy Times Square billboard was unveiled during The Late Show. Since then, Kate's been on the go with Chrissy Teigen Read more

Jon Hamm and Kate Upton share the cover of Esquire's March issue. Kate, who was unveiled as Sports Illustrated's 2012 Swimsuit Issue cover girl Monday, posed in skimpy lingerie for photographer Yu Tsai. Jon was also shot by Yu, but he kept covered up in stylish menswear. Jon's gearing up for the fifth season of Mad Men, which premieres with a two-hour episode on March 25. Kate got candid with the Read more

The Sports Illustrated Swimsuit Edition celebration made its way to Las Vegas last night. Kate Upton, Chrissy Teigen, and Anne V were just a few of the ladies that traveled to Sin City after attending the NYC SI bash on Tuesday. Chrissy joined a few other models at Planet Hollywood, where they cemented their handprints in honor of the latest issue. Kate's been front and center since it was Read more

Sports Illustrated's Swimsuit Issue launch party was a hot place to be in NYC last night. SI's new cover girl Kate Upton posed in a red dress alongside fellow models Chrissy Teigen, Bar Refaeli, Alyssa Miller, Anne V, and Irina Shayk. Kate, Chrissy, and Alyssa followed the bash with a flight to Las Vegas, where they'll continue to promote the issue. The ladies stripped down to their bikinis in Read more

Kate Upton is the cover girl of this year's Sports Illustrated Swimsuit Issue! Her honor was revealed last night on the Late Show in NYC, where Kate spoke with host David Letterman about nabbing the front of the annual magazine. Kate's the latest in a long line of two-piece-clad models to claim the title — click through to see her bikini shots, and make sure to check out all the Sports Read more

Kate Upton donned a little white dress to unveil her new Sports Illustrated Swimsuit Issue cover in NYC today. A huge billboard of the cover on display in Times Square features Kate in a skimpy bikini with a sexy smile on her face. She later headed to The Late Show for her first official appearance as an SI star. Nineteen-year-old Kate follows in a long line of ladies to be honored with the Read more

This week in the world of Twitpics, we got a glimpse of celebrity vacations, went behind the scenes on photo shoots and TV appearances, and even helped welcome a furry new member to the Beckham family. Can you handle the cuteness? Click through to see each photo. Read more