New Year's Eve

New Year's Eve Party Stars

From N.Y.C. to Sin City, see how Gaga, Fergie, Rihanna and more popped the cork on 2012

SHOW-TOPPER

Who can resist a hunk in a hat? Certainly not Fergie, who preps her pucker for hubby Josh Duhamel at the grand opening of The Mirage's 1 OAK Las Vegas, where she served as host and also performed at the New Year's Eve event.