Heidi calls up Grammy Award winner Michael Bublé to guest judge during Week 2 of the Judge Cuts to help determine which acts will go to the live rounds.

See all the best performances and most impressive acts from Season 10 of America's Got Talent.

Nick, Howie, Howard, Mel B and Heidi embark on the nationwide search for the most talented act in America.

Week 2 of the auditions jumps into hyperdrive as Nick and the judges continue their search for the million-dollar act.

Nick and the judges scour the country during Week 3 of the America's Got Talent auditions.

Season 10 kicks into high gear as AGT's most extreme acts vie for the million-dollar prize.

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The nationwide search for talent continues as Nick and the judges witness some of AGT's most incredible auditions yet.

It's the last chance for talent to make the grade before AGT narrows the field during the judges' cuts.

Howard invites Neil Patrick Harris to guest judge during Week 1 of the Judge Cuts to help determine which acts will go to the live rounds.

Howie taps Marlon Wayans to guest judge for Week 3 of the Judge Cuts to help determine which acts will go to the live rounds.

See all the memorable moments from the last 10 seasons of America's Got Talent, from the weird and wonderful to the truly awesome and inspirational. Revisit 10 years of talent featuring past winners, special moments, favorite performances and commentary from our judges and host, including interviews with current stars Howard Stern, Heidi Klum, Howie Mandel and Nick Cannon.

Mel B brings back Piers Morgan to guest judge during the final week of Judge Cuts.

Nick Cannon hosts a celebration of the most successful worldwide TV format in history, as the most memorable "Got Talent" moments from around the globe provide jaw-dropping displays of talent. From danger acts, child prodigies, incredible dancers, shockingly trained animals and amazing talents that defy categorization, World's Got Talent truly has it all.

AGT goes live for the first time this season, showcasing 12 amazing acts giving their best for America's votes and a place in the semifinals.

Nick Cannon reveals the first vote results, then America and the judges make on-the-spot saves. Season 9 winner Mat Franco performs.

Twelve more performers go all out for America's votes and a chance at the semifinals.

Last night's top vote-getters are announced, then two acts from remaining seven are saved on the spot. AGT alums Emily West and William Close perform.

The remaining 12 acts perform live, looking to win America's votes and a spot in the semifinals.

The final seven acts for the semifinals are announced - including two who are saved from elimination on the spot. Guest performance from Le Rêve-The Dream.

Eleven acts take the stage, looking for America's votes and a trip to the AGT finals.

The first batch of five finalists is revealed, including two acts saved on the spot; The Illusionists perform.

The final 12 acts of the top 24 perform for the judges.

Five acts advance to the finals, rounding out the top 10; Little Mix performs; acrobatic gymnasts AcroArmy perform.

The contestants from the top 10 acts compete for the last time, and hope to win the competition and the $1 million prize; a special performance from Flo Rida and The Rockettes.