<P> On September 13, Olate Dogs were announced the winner of the season, becoming the show's first completely non-singing act to win the competition and also the first non-solo act to win . Comedian Tom Cotter finished as the runner - up . </P> <P> Season eight of AGT premiered on Tuesday, June 4, 2013 . The new season was announced in a promotional video shown during a commercial break for season seven's second live show . Sharon Osbourne initially stated that she would not return for the season, but later said that she was staying with the show "for now ." Osbourne confirmed that she would be leaving the show after a feud with NBC on August 6, 2012 . </P> <P> On February 20, 2013, it was announced that one of the Spice Girls members, Mel B (Melanie Brown), would replace Sharon Osbourne as the third judge . Entertainment Weekly also reported at the same time that NBC was looking at a possible fourth judge to be added . On March 3, it was announced that supermodel Heidi Klum would be joining the show as the new fourth judge . </P> <P> An Audition Cities poll for the season was announced on July 11, 2012 . The first batch of Audition Cities were announced as Los Angeles, Seattle, Portland (Oregon), New Orleans, Birmingham, Memphis, Nashville, Savannah, Raleigh, Norfolk, San Antonio, New York, Columbus (Ohio), and Chicago . This season, the auditions traveled to more cities than ever before . America's Got Talent moved its live shows to Radio City Music Hall in New York for season eight . Auditions in front of the judges and an audience began taping on March 4 . The show traveled to New Orleans, New York, Chicago, Los Angeles, and San Antonio . </P>

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