Rihanna and Chris Brown perform at the Z100′s Annual Jingle Ball Concert at Madison Square Garden in New York.  Other performances included Katy Perry, Ne-Yo, Jesse McCartney, Kanye West and Lady GaGa.

Other celebs attending the event:

• Leona Lewis
• Ashley Tisdale
• Nick Lachey
• David Archuleta

Can you believe it is less than 2 weeks to Christmas??? Are you ready for it?

Lots of pics after the break

Click on thumbnails to enlarge

Photos:  WENN