03/09/2010 at 03:00 PM EST
, scouting out jewelry from Nicole Richie
's House of Harlow line
during a visit to Kitson at the Americana mall in Glendale, Calif. The pop star, who was with her mom Lynne and a male friend, spent 15 minutes in the shop, where she also tried on some booties from the Olsen twins' Elizabeth and James line.
was far from the Upper East Side over the weekend: The Gossip Girl
star hosted a bash at Haze Nighclub in Las Vegas, where she drank Diet Coke, water and champagne all night. Meester also performed two songs, including "Somebody to Love," for the crowd, which included her mom, brother and some friends.
Over at another Sin City hotspot, Jet Nightclub, Jersey Shore
couple Ronnie Ortiz-Magro and Sammi "Sweetheart" Giancola, sipped on tequila and held court in the deejay booth, giving shout-outs to clubgoers while hosting their own bash. Earlier, the duo also stopped for dinner at Stack, where they ordered a bunch of food including Kobe meatball pizzas, spicy crab wings and lobster tacos.
stopped by Anastasia Beverly Hills for an eyebrow shaping appointment with Anastasia Soare herself. Despite venturing through a throng of paparazzi, once inside the salon Jennifer was very calm and friendly, and chatted animatedly throughout her appointment.
Amid a sea of beards at the SNL
afterparty at New York's Wildwood Barbeque, guest host Zach Galifianakis
was hard to spot after he shaved his signature beard on the show. The comedian was joined by his girlfriend, mom and brother, as well as Paul Rudd, Sam Rockwell
and some of the SNL
By ALEXIS CHIU, ANDREA DESIMONE, LESLEY MESSER and SUSAN YARATuesday's Caught in the Act >