04/29/2010 05:12 am ET | Updated May 25, 2011

Undeserving Best Picture Winners: Which Was The Biggest Oscar Upset? (PHOTOS)

Most of the Oscar best picture buzz has focused on an ex-spouse face-off between 'Avatar' and 'The Hurt Locker,' but the instant runoff system that will decide the winner among this year's nominees could make way for a surprise 'Inglourious Basterds' win.

It wouldn't be the first time the Academy awarded a 'best picture' that wasn't widely considered the best. Here are some of the bigger "Best Picture" upsets in Oscar history. Vote on if they were worthy winners or should have stayed in their seats.

Check the captions to read the movies these winners beat - like how "Rocky" beat "Taxi Driver" and "Crash" beat "Brokeback Mountain."

undeserving oscars