But seven months after the first auditions were held, only one act could stand alone and snag the $1 million prize and a show in Las Vegas.
Who was crowned the winner? Read on to find out ...
This season went to the dogs – the Olate Dogs, that is. The pack of acrobatic animals and their two trainers outlasted comedian Tom Cotter, who finished as the runner-up.
William Close and the Earth Harp Collective placed third, David Garibaldi and his CMYKs fourth, Joe Castillo fifth and The Untouchables sixth.
If you weren't much of a dog person, Thursday's finale had plenty of other performances, including appearances by Justin Bieber, Flo Rida, Ne-Yo and the Blue Man Group.