20. Piranha (2010)
Director: Alexandre Aja
Stars: Elisabeth Shue, Jerry O'Connell, Adam Scott, Ving Rhames
Contemporary horror master Alexandre Aja (High Tension) shoots for camp and hits the bull's-eye in this update of the Roger Corman-produced classic, in which hundreds of man-eating fish invade a T&A-filled Spring Break town. 3D provides a knowing wink to the film's horror-based gags, like when a "Girls Gone Wild"-type filmmaker (Jerry O'Connell) experiences his own marine-based version of castration...with his severed organ floating right towards audience before it's chomped up. It may lack a compelling story line, but Piranha is modern 3D moviemaking at its giddiest.