Kim Kardashian
Nobody does sparkly sexy like Kim, which is why she's the New Year's Babe of the Year at Tao in Vegas.
Jennifer Hudson & Fergie
The Idol and the Princess of the Peas represent the Best Coast as they host Dick Clark's New Year's Rockin' Eve with Ryan Seacrest in Burbank, Calif.
Rihanna, Jay-Z, Kanye West
Jay-Z's Vegas concert at the Cosmopolitan in Vegas not only included guest appearances from the stars pictured above, but also Beyoncé and Coldplay's Chris Martin.
Bruno Mars
The "Grenade" launcher launched into a set of his hits at Haze in Vegas for a celebrity studded crowd that included Rihanna.
Marc Anthony & Jennifer Lopez
Celebrating with family and friends in Vegas, Marc & J.Lo take in a New Year's Eve performance of The Beatles' Love by Cirque du Soleil.
Ashanti & Nelly
Nelly cozy's up with his lady after hosting a New Year's Eve blowout at Haze Nightclub at ARIA in Las Vegas
B.o.B.
The "Nothin' on You" rapper rocks the mic at Jet Nightclub at the Mirage in Las Vegas. Magic? Oh yes.
Holly Madison & Angel Porrino
Apparently not working on her New Year's Resolution to "get more sleep" Peepshow star Holly hangs out with pal Angel.
Rob & Kim Kardashian
The Kardashian kids prepared to make a little noise for the new year at Tao Las Vegas. Woot woot!
Carrie Underwood
The country-pop superstar rocks the stage at the Borgata Hotel Casino & Spa in Vegas.
Diddy
Our favorite party monster parties on in Vegas at LAX inside the Luxor, where he was spotted chomping on Trident Vitality gum and swigging champagne.
Hugh Hefner & Crystal Harris
Those crazy engaged kids blow off steam at the Playboy Mansion.
Rihanna
Clearly enjoying a New Year's sway, the superstar raises the roof in mellow style at Pure Nightclub in Vegas.
Snooki
Hamster drop, 2010! NYC naysayers wouldn't let her be a baller in Times Square, so The pint-sized Jersey Shore star took her show to MTV's New Year's Bash in Seaside Heights, New Jersey. And she's clearly having a ball, being dropped at midnight, "like a friggin' hamster."
MORE PICS: Best of 2010: The Best of Absolutely Everything