Usher performed Numb,Climax &more at 2012 American Music Awards,new clip. Last night,mega R&B star Usher,hit up the 2012 American Music Awards stage to belt out three of his songs: “Numb,” “Climax,” and “Can’t Stop Won’t Stop.” As usual,it was a very lively and uptempo set as Usher really knows how to move and work the [...]

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