Viewers selected the top three favorites via phone, e-mail and text message votes, while judges Piers Morgan, Sharon Osbourne and David Hasselhoff were set to pick a fourth finalist. But the judges couldn't choose, so they changed the rules and expanded the final slate to allow an additional act.

A trio of tenors, three singing siblings, five dancing sisters, a 75-year-old comedian and a singing chicken farmer will advance to the finals of "America's Got Talent."

All are vying for a $1 million prize and the chance to headline a Las Vegas show in October. Another 10 semifinalists will compete for the remaining final four spots next week.

Five other acts were dismissed from the NBC talent show during Wednesday's episode.

Source: AP