<P> The fifth season of America 's Got Talent , an American television reality show talent competition , premiered in the United States on the NBC network and on Canada 's Global on June 1 , 2010 . Soul singer Michael Grimm was named the winner on September 15 , 2010 , beating 10 - year - old classical crossover singer Jackie Evancho . Piers Morgan and Sharon Osbourne returned as judges . After four seasons on the show , David Hasselhoff left to host a new show and was replaced by Howie Mandel . </P>
who won the fifth season of america 's got talent
Michael Grimm