The countdown to the new year is on and the stars are ready to party!

Carrie Underwood and Miley Cyrus are ringing in 2008 with Ryan Seacrest on Dick Clark's New Year's Rockin' Eve from Times Square, while newly-engaged Fergie is fronting the show from Hollywood.

"Entourage" star Adrien Grenier will party in sunny South Beach at hip hotel Victor with his band The Honey Brothers. Also in Miami: Playboy's December centerfold Kim Kardashian, who will be holding court at club Mansion.

But when it comes to star-gazing this New Year's Eve, Sin City is the place to be.

Avril Lavigne is hosting the grand opening of hotspot Prive at Planet Hollywood Resort and Casino, while Mariah Carey will be ringing in the new year at Tao nightclub.

And some stars in Vegas are getting paid incredible sums to party.

Pam Anderson's reportedly raking in $500,000 to host a bash at Pure in Caesar's Palace. Paris Hilton and sister Nicky will be paid $1 million to whoop it up at LAX inside the Luxor Hotel.