2010 is upon us, but let's take one final peek back at the last night of 2009. You saw what we all wore, now it's time to focus on the celebs. Christina Aguilera and Nicole Richie partied at Lavo in Vegas — Christina in a sexy LBD and Nicole in a long-sleeve sequin dress. Keri Hilton represented NYC with a Statue of Liberty frock, Leona Lewis wore a poofy number, and Fergie donned a one-shoulder black stunner with fingerless gloves. All glitzy, but which NYE outfit rocks your boat?