by Free Britney at

Christina Aguilera and A Great Big World performed their hit collaboration "Say Something" at the 2013 AMAs Sunday, live from L.A.'s Nokia Theatre.

With her hair in a braid and wearing a muted black dress, Xtina offered a fairly stripped-down performance compared to the night's more gaudy showcases.

Watch her do her thing along with the group below ...

Following A Great Big World's performance with Aguilera on The Voice, last week, "Say Something" debuted at No. 1 on Billboard's Digital Songs chart.

The band's debut full-length album Is There Anybody Out There? will be released in January 2014 and has fans already waiting anxiously in anticipation.

What did you think of their AMA performance?

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by Hilton Hater at

They can do a lot more than merely judge a reality competition together.

At last night's American Music Awards, Adam Levine and Christina Aguilera anchored a rendition of their hit, "Moves Like Jagger," which had famous faces in the crowd up and dancing. Watch this duo belt out the track on stage now, as Jaden Smith, Selena Gomez, Taylor Swift and others groove to it while watching from the audience:

For a look at other performances from the show - including Nicki Minaj and her butt speakers - visit our AMA video section and enjoy these artists!

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by Hilton Hater at

Christina Aguilera used the American Music Awards as a platform for her upcoming movie, Burlesque.

You can watch a clip from that upcoming musical HERE, and can also be treated to a preview of a song off its soundtrack below.

The newly-single singer belted out "Express” during the event, which was held at the Nokia Theatre in Los Angeles. The tune is courtesy of this November 24 release, co-starring Cher and featuring Aguilera in her first big screen role. Watch the following video and then check out stills of Christina performing:

  • Expressing Herself
  • Burlesque Performance Pic
  • Xtina at the AMAs
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