Leighton Meester and Sebastian Stan
Jean Baptiste Lacroix/WireImage
08/12/2009 at 04:00 PM EDT
and boyfriend Sebastian Stan
, sharing champagne during a brunch party at Day & Night Restaurant
& Beach Club in Southampton, N.Y. The two were partying poolside – in a
cabana – alongside Mischa Barton
, going on a shopping spree at Vionnet boutique on L.A.'s Robertson Blvd. The tanned and happy singer, who sported a minidress, picked up items from the store's in-house clothing label, Decolette, including several lace-trimmed slip dresses in every color and jewelry from Soixante Neuf and Indulgems.
During her recent New York visit, Paula Abdul
made sure she didn't neglect her fans during dinner out at DelFrisco's in
midtown Manhattan. Despite busily chatting on her phone throughout the
entire dinner, the former American Idol
judge said hello to a table of
female fans. "She was friendly," says an onlooker.
, affectionately stealing fries off
boyfriend David Katzenberg
's plate during dinner with a female
friend at Table Eight in L.A. In between bouts of texting, Hilton also
leaned in and whispered with her beau when their friend left the table. The
group enjoyed their early meal – then took off before the neighborhood
joint filled up at 8 p.m.
By KRISTIN BOEHM, MAUREEN HARRINGTON, MELISSA LIEBLING-GOLDBERG and KRISTEN MASCIAWednesday's Caught in the Act >