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The 22-year-old Gossip Girl star – who recently squirmed uncomfortably when Ellen DeGeneres flashed a picture of the couple – sipped bottles of Bud Light while cozying up with Underwood in a middle banquette.
At one point, the 24-year-old American Idol champ, wearing a jewel-embellished blue dress and knee-covering black boots, slipped onto the dance floor with her beau, throwing her arms around his neck as they danced suggestively.
The twosome then headed back to their table to watch the floor show, provided by performers in Oompa-Loompa costumes. They stayed there chatting until almost 2 a.m., when they headed out of the club together.
Also in the house for Marquee's big night? Jay-Z, Usher and Jermaine Dupri.
JOSH & FERGIE: ROCKED BY SCANDAL
Did he cheat with a stripper?
Married less than a year, the couple denies an Atlanta woman’s claims that she and Josh had a fling
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