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

FORGET 2011!

Also at the NIVEA Kiss Stage in N.Y.C., Cee Lo Green wows the crowd with his take on John Lennon's "Imagine" for NBC's New Year's Eve with Carson Daly special.