Stars gave glimpses into their glamorous lives on Twitter this week. Alessandra Ambrosio posed in lingerie with fellow Victoria's Angels Candice Swanepoel and Erin Heatherton, while Britney Spears had a belated birthday bash at the end of her tour. Taylor Swift got dolled up for a ball, and Tom Cruise met fans in Madrid before a Mission: Impossible— Ghost Protocol premiere — click through to Read more

Celebrities got social this week on- and off-line. Rachel Zoe and Rodger Berman showed their support for the Bill Clinton Foundation, while Katherine Heigl and Josh Kelley kissed at an event for women in Hollywood. Britney Spears gave a thrilling performance to her Swedish fans, and Usher horsed around — click through to see all the pics, and don't forget to follow PopSugar on Twitter for Read more

Celebrities were hard at work this week and showing it off on Twitter! Britney Spears brought her boys on her Femme Fatale tour, while Hugh Jackman took to the press circuit for Real Steel. Eva Longoria posed poolside for a photo shoot, and Sofia Vergara made an appearance on Sesame Street — click through to see all the pics, and don't forget to follow PopSugar on Twitter for exciting news and Read more

This week, we were able to get a sneak peek at the luxurious lives of celebs thanks to Twitter! Britney Spears took in the gorgeous views of London, while Gwyneth Paltrow went backstage with Lenny Kravitz. Gisele got wild with rock n' roll, and Eva Longoria had a bra fitting with Ellen DeGeneres! Click through to see all the pics, and don't forget to follow PopSugar on Twitter for exciting news Read more

The Nickelodeon Kids' Choice Awards roll into LA tonight and we're getting ready by taking a look back at the show's most memorable photos. From Britney Spears's famous backstage run with Brad Pitt to Tom Cruise's moment in the slime light. Click through to see all the exciting pics from the show's past and we'll be updating from all the action! Read more

Lots of our favorite celebrities were busy tweeting away this week, with Nicole Richie sharing her Rihanna concert photos and Jessica Simpson snapping a pic of her beautiful, new Birkin bag. Britney Spears took a backstage photo with her entire family while Eva Longoria posed solo during a visit to Times Square — click through to see all the pics, and don't forget to follow PopSugar on Twitter Read more