WATCH: Christina Aguilera Performs ‘Say Something’ at AMAs 2013

http://youtu.be/cE3o3Z7rjP8

Christina Aguilera and A Great Big World sang their somber duet “Say Something” at the 2013 AMAs tonight. Check out the performance above.

And here’s what she looked like on the red carpet:

See all the best photos of Christina at the AMAs — on and off the stage — here:

And for more American Music Awards performance videos and photos: