Stars Come Out for Z100 Jingle Ball

Ashley Tisdale and Nick Lachey hosted this year's Jingle Ball concert in New York City last night.

While these stars smiled for the camera backstage, they certainly weren't the only celebrities on hand.

The Hottest Couple of the Night award? That was an easy one to hand out, as Rihanna and Chris Brown performed a steamy song for fans...

What other entertainers turned out for the annual event? Click on the images below to find out!