In keeping with an American tradition, folks like Keri HilsonJustin Bieber and Robin Thicke took to the stage at the Aria Resort & Casino at the City Center Thursday night (Dec 31) in Las Vegas and performed during Dick Clark’s Annual New Year’s Rockin’ Eve celebration. Pop singer Jennifer Lopez performed her set for the event in New York City’s Times Square.

The Black Eyed Peas, undoubtedly one of the biggest musical acts of the year 2009, also performed at the show (in Vegas), which aired live on ABC and was hosted by Ryan Seacrest and Dick Clark from Times Square, New York City.

Check out tons of pics from the show when you continue reading…

Black Eyed Peas // Dick Clark's New Year's Rockin' Eve with Ryan Seacrest

Justin Bieber // Dick Clark's New Year's Rockin' Eve with Ryan Seacrest

PHOTOS: GETTY IMAGES / WIRE IMAGE