Horror Hunks: Jerry O'Connell, Cody Longo, Steven R. McQueen & naked extras in Piranha 3D (2010)

Piranha 3D was a remake of the 70s creature feature and found an army of the prehistoric man-eating fish unleashed on a busy Spring Break on the water. Given the setting, it's no surprise that there were multiple opportunities for male cast members to ditch their shirts. Jerry O'Connell appears in a red speedo in his role as a wild videographer, looking to capture footage of nude women for his website. Cody Longo is shirtless for his character's final scene as he attempts to escape the water after the piranha's attack. Steven R. McQueen is also briefly shirtless, as he tosses his shirt aside in an attempt to search for his crush after she goes missing from the water. There's also some male nudity early in the film, as Steven's character comes upon a trio of guys mooning people, with a message on their butts.