<P> David Hasselhoff left to host a new television show and was replaced by comedian and game show host Howie Mandel . This made Piers Morgan the only original judge left in the show . The show premiered Tuesday, June 1, 2010, at 8 pm ET . Afterward, Talent resumed the same time slot as the previous season . </P> <P> On September 15, singer Michael Grimm was named the winner . He won a $1 million prize and a chance to perform at the Caesars Palace Casino and Resort on the Las Vegas Strip, as well as headline the 25 - city America's Got Talent Live Tour along with runner - up Jackie Evancho, Fighting Gravity, Prince Poppycock, and the other top ten finalists . </P> <P> Season six premiered on Tuesday, May 31, 2011, with a two - hour special . Piers Morgan and Sharon Osbourne continued as judges after taking jobs on Piers Morgan Tonight and The Talk, respectively . On The Tonight Show with Jay Leno on July 27, 2010, Morgan officially stated that he had signed a three - year contract to stay on Talent . </P> <P> The show held televised auditions in Los Angeles, New York, Minneapolis, Atlanta, Seattle, and Houston . Non-televised producers' auditions were also held in Denver and Chicago . Previews of auditions were shown during NBC's The Voice premiere on April 26 . Online auditions via YouTube were also held for the second time in the show's run, beginning on May 4 . Finalists for this audition circuit competed live on August 9 . </P>

When are america's got talent auditions over