There's nothing Demi Lovato [1] can't do, including hijack a medley from John Legend [2] and other great singers. The star took on "Hello" during a Lionel Richie tribute [3] at the Grammy Awards, while Richie himself proudly watched from the audience. Not only does she rock it, she full-on slays it. Like, kids might be assuming it's her song from now on. Watch above, check out her red carpet look [4], and see who all the winners [5] are this year!