Christina was all business when heading into the Nokia Theater in LA earlier this weekend to start rehearsing for the American Music Awards. The show is just a few hours away, and Christina will be the opening act showcasing some of her biggest hits of the past and present. We've already gotten a peek at Rihanna heating up the stage as well, but don't forget to tune in tonight to see all our coverage here and the live Love It or Hate It polls on Fab and Bella!
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