'America's Got Talent' Winner Crowned!

Who won the top prize on America's Got Talent? 

Video: Howard Stern Weighs in on 'Idol' Judges' Exit

In order of elimination, The Untouchables were the first act to get the axe tonight, followed by sand artist Joe Castillo, performance artists David Garibaldi & The CMYKs and harpist William Close, who rounded out the bottom four.

Comedian Tom Cotter scored second in the thrilling two-hour finale which featured superstar performances by Justin Bieber, Ne-Yo, Flo-Rida (with David Garibaldi and his CMYKs), One Republic (with William Close), the PS22 choir (with Joe Castillo), Big Sean and Green Day.

Ultimately, season seven was one for the dogs as the high-flying Olate pups were crowned champs tonight on AGT, securing the $1 million prize and a headlining show in Las Vegas!