Humberto Carreno / startraks
Mary-Kate Olsen, watching the crowd on the dance floor during a night out with two female friends at West Hollywood lounge Winston's. Olsen, who smoked cigarettes and sipped Red Bull during the evening, checked out the deejay as he spinned the 1970s songs "Life Is a Rock (But the Radio Rolled Me)" and "Magnet and Steel."
Grey's Anatomy star Sandra Oh, shopping for housewares with a pregnant girlfriend at French bistro Café Midi in L.A. Meanwhile, Dancing with the Stars alum George Hamilton enjoyed lunch on the patio.
Courtesy Il Sole
Heroes cast members Hayden Panettiere, Ali Larter and Greg Grunberg, crowding around a pool table at West Hollywood bar and restaurant Lola's. The costars – including Jack Coleman and Santiago Cabrera – cheered as Panettiere and Larter played around.
By MARISA LAUDADIO
Tuesday's Caught in the Act! >