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Rumer Willis

Courtesy TAO/Denise Truscello

RUMER HAS IT: Rumer Willis celebrated her 21st birthday at Tao at the Venetian Las Vegas Saturday night with Madonna and Elvis impersonators. Oh yeah, mom Demi Moore, Ashton Kutcher, dad Bruce Willis and his new wife, Emma Heming, were also there.

Rumer's Sorority Row costars Audrina Patridge, Briana Evigan and Jamie Chung joined in the festivities, which included a midnight toast with Patrón Platinum tequila.

Want to know what some more of your fave celebs, including Justin Timberlake, Charlize Theron and Shia LaBeouf, have been up to lately? Keep reading to find out.

PUPPY LOVE: Rachelle Lefevre, playing with her dog at Chateau Marmont hotel in West Hollywood, while Ashlee Simpson-Wentz and Jessica Stroup sat at a nearby table for the K-Swiss Classic dinner.

ALL FIRED UP: Kanye West, enjoying the interactive show Fuerza Bruta: Look Up in NYC with 11 friends, including girlfriend Amber Rose.

HIGH STEAKS: Justin Timberlake, promoting his tequila, 901, while dining with a group of men at STK in L.A.

SOMETHING'S FISHY: Jamie Foxx, dining two nights in a row at Chicago's Sunda restaurant.

Inglourious Basterds, Brad Pitt

Francois Duhamel/ TWC

FASHIONABLE FETE: Calvin Klein and Donna Karan, attending the Film Society of Lincoln Center screening of Inglourious Basterds at the Goose Creek estate in East Hampton.

COOKOUT: Top Chef's Stefan Richter, firing up the grill at the opening of his restaurant, Stefan's at L.A. Farm, while show judge Gail Simmons was across town launching Nespresso's new line CitiZ.

HOLD THE LIQUOR: Shia LaBeouf, attempting to order a root beer while hanging out with a guy pal at Madame Royale lounge in Hollywood.

HAND WORK: Evangeline Lilly, getting a 65-minute Smooth Massage at Ona Spa in L.A.

NEW DEAL? Charlize Theron, having drinks with Hollywood writer Aaron Sorkin at the Four Seasons in Beverly Hills.

LADIES' NIGHT: Lindsay Lohan, helping Samantha Ronson celebrate her 32nd birthday at the Hudson Terrace in NYC.

—Additional reporting by Dahvi Shira

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For more celeb sightings, check out our Big Picture photo gallery.