It’s the Year of the Tiger, according to Chinese astrology. “Rawr,” I say! We spied on Hollywood’s party animals to see how they unleashed their inner tigers (and tigresses) on New Year’s Eve.

Lady GaGa performed at the Fontainbleau Hotel in Miami Beach, Florida. It wasn’t just her new ‘do and getup that spelled extravagant; she reportedly checked in a $15,000-a-night penthouse.

Kim Kardashian at a Pre-New Year’s Eve Party at Eve Nightclub, Las Vegas.

Pam Anderson was escorted by some interesting creatures at the Gridlock 2010 New Year’s Eve bash at Paramount Studios, Hollywood.

Hot mommies Christina Aguilera and Nicole Richie left the little ones at home to party in Vegas. Nicole hosted the LAVO party with beau Joel Madden, while Christina hosted and performed at TAO.

Fergie (right) performed with the Black Eyed Peas at the Mandalay Bay Events Center in Las Vegas. It was one of the many gigs they had for the New Year weekend.

Mariah Carey got her Mimi on at Madison Square Garden in New York, while hubby Nick Cannon played deejay offstage.

She may have gotten the crowd going at Times Square, but I’d stay away from the skintight suit if I were J.Lo.