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It's show time! Katy Perry stays in step with beau Russell Brand Tuesday while heading to a matinee of 2012 at The Grove in West Hollywood.
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SCHOOL OF ROCK
Shedding her preppy Gossip Girl threads for a rocker's wardrobe, Leighton Meester performs for a crowd – and boyfriend Sebastian Stan (left) – Tuesday night at American Eagle's new Times Square store in N.Y.C. The starlet released the music video for her single "Somebody to Love" last week – check it out here!
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A low-key Zac Efron makes a safe landing at London's Heathrow Airport on Wednesday. The actor is reportedly in town to premiere his latest film, Me and Orson Welles, which hits U.S. theaters on Nov. 25.
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Justin Timberlake fêtes pal Leona Lewis at L.A.'s Hyde Lounge Tuesday night at the ASICS release party celebrating her album Echo. The Brit singer's sophomore record is already climbing the iTunes Top 10.
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Meanwhile, Nine star Penélope Cruz is dressed for business – in one tailored black dress – while arriving at The Late Show with David Letterman Tuesday in New York.
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Mariah Carey steps out in style, leaving Paris's Hotel George V on Tuesday en route to NRJ Radio. Later that day, the singer visited the variety show Le Grand Journal, where she promoted her latest album, Memoirs of an Imperfect Angel.
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John Mayer hits one intense note during a MySpace secret show at the Music Hall of Williamsburg in Brooklyn, N.Y., Monday night. The rocker debuted tracks off his just-released album, Battle Studies, and played old favorites at the intimate club gig.
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Is she bringing back the fanny pack? After a night on the town, Rihanna makes a bold – but practical – fashion statement while leaving her London hotel Tuesday.