Star Tracks - Wednesday, September 19, 2007

Def Jam label mates Jay-Z and Kanye West throw up the Roc-A-Fella sign at GQ's 50th anniversary celebration at Cedar Lake in New York on Tuesday. "Kanye cares more about music than any person making music right now," Jay-Z told PEOPLE at the event.

Facing allegations of habitual drug and alcohol use in her custody battle, Britney Spears indulges in a wholesome treat – ice cream! – during a Tuesday outing in Beverly Glen, Calif.

Brad Pitt escorts Angelina Jolie (sans their ever-present brood) Tuesday to the New York premiere of his film The Assassination of Jesse James by the Coward James Ford. When asked if she was nervous for Pitt on his big night, Jolie told PEOPLE, "We only get nervous when it's about important things like family."

After making her long-awaited debut on Weeds Monday, Mary-Kate Olsen finds culture with sister Ashley (not pictured) at artist Antony Micallef's Los Angeles art show opening on Tuesday.

Kate Bosworth wraps herself around 21 costar Jim Sturgess Tuesday during the Los Angeles screening of his Beatles-themed film, Across the Universe.

Prince escorts two model citizens down the purple carpet Tuesday to attend The Golden Age of Couture VIP fund-raising gala at London's Victoria amp Albert Museum. The exhibit, of Paris and London fashions from the 1940s and '50s, will be on display through January.

Back from New York Fashion Week, Hilary Swank strikes her own stylish pose for a circus-themed magazine photo shoot in Los Angeles on Tuesday.

Emmy winner Katherine Heigl and her Grey's Anatomy costar T.R. Knight get close during The Advocate magazine's 40th anniversary celebration at West Hollywood restaurant Republic on Tuesday.

Jennifer Aniston greets her crew Tuesday as she arrives on the Los Angeles

set of her new film, He's Just Not That into You, which is based

on the best-selling self-help book.

With Good Luck Chuck costar Dane Cook by her side,

self-proclaimed klutz Jessica Alba shows off her trick thumb on the CBS

Early Show Tuesday in New York.

Model Petra Nemcova shares a little bubbly Tuesday, while launching the new

Moet Chandon Be Fabulous Gold Bottle in Madrid.

Kelly Ripa and Regis Philbin gear up for their fifth annual Relly Awards on Tuesday in New York, where the affable hosts will present the "golden stool" for such categories as "best non-human guest" and "best Regis impression." The winners will be announced on Friday's broadcast.

Living up the nightlife, the fashionable Kylie Minogue returns home late

Sunday, after a night on the town with friends in London.

Supermodel Kate Moss arrives in style Tuesday for The Golden Age of Couture

party at the V amp A museum in London.

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