These four tough guys looked intimidating when they took the stage, but it was all part of their act to soften up the talent show judges.

Linkin Bridge is made up of four burly singers who've been hanging around together since they were kids-and their harmonies show it.

The judges on "America's Got Talent" appeared unimpressed by the members' introduction, but their faces light up when they realized they misjudged the four friends, as Linkin Bridge launched into an a cappella version of "Somewhere Over the Rainbow."

This isn't the first time Linkin Bridge has blown up stereotypes - last Christmas, they surprised affluent suburban residents by showing up at their front door and singing carols.

(WATCH the video below from America's Got Talent) - Photo: America's Got Talent

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