Nicki Minaj, LMFAO Join ''Dick Clark's New Year's Rockin' Eve'

Justin Bieber and Lady Gaga already booked for the show.

Nicki Minaj, Florence and the Machine and LMFAO will be in New York's Times Square on New Year's Eve. The acts are the latest additions to the star-studded lineup for the 40th annual "Dick Clark's New Year's Rockin' Eve"
 extravaganza. They join a lineup that already boasts Justin Bieber and Lady Gaga.

The show, which will be anchored by "American Idol" host Ryan Seacrest, with help from Fergie in Los Angeles and Jenny McCarthy in New York, will air live from 8 p.m. until after midnight on December 31. The Los Angeles portion of the show has added Taio Cruz, Minaj, Florence, Gym Class Heroes, Blink-182, OneRepublic, the Band Perry, and Christina Perri. Gaga, Bieber, Pitbull and Hot Chelle Rae will be on hand for the New York portion of the show.

The performance will help cap a busy holiday season for Bieber, whose first-ever holiday album, Under the Mistletoe, crept back into the top three this week on the Billboard 200 albums chart as it steams its way toward 700,000 sold.

Gaga will also cap a wild end to a big year, which has recently included her own Thanksgiving TV special, a visit to the White House on Tuesday
 to discuss her anti-bullying campaign and a trio of Grammy nominations, not to mention the opening and closing slots on the"Grammy Nominations Concert Live!!"

"Well, Album of the Year
 and Pop [Vocal] Album ... both mean a lot to me," she told MTV News after the nominations were announced. "I mean, they all three do. I'm 25! Four years ago, I was dancing on the bar, so [I'm] pretty happy to be here."