Caught in the Act!
03/09/2011 AT 06:00 AM EST
Care for a rematch? Zac Efron and a pal stopped by the Parlor in Los Angeles on Sunday, where they played beer pong for a few hours. Though the bar was packed, the actor didn't seem to draw much attention, saying hi to a few people in passing, a source tells PEOPLE.
After catching the Jean-Charles de Castelbajac fashion show in Paris on Tuesday, Katy Perry made her way to rue Saint-Honoré, where she did some shopping at Colette.
Also in Paris: Kate Moss, Nicole Richie, Liv Tyler and Kanye West, who each popped into L'Arc nightclub to congratulate Givenchy designer Riccardo Tisci as he celebrated after his runway show.
Glee's Mark Salling, with singer Ryan Cabrera and some other friends, checked into the Rock Star Suites at the Hard Rock Hotel San Diego for a guys' weekend. The group kicked back in a private cabana at poolside lounge Float, washing down sliders, fish tacos and barbecue pizza with beer, before heading to the hotel's 207 nightclub, where they switched to Grey Goose cocktails and talked to a few girls.
By PERNILLA CEDENHEIM, JENNIFER GARCIA, PETER MIKELBANK and DAHVI SHIRA