Actor/comedian Billy Crystal began the 2012 Academy Awards ceremony with the traditional opening tune. But he might have overstepped his boundaries with one pun.

Halfway through the humorous tune, Crystal poked some fun at actor Jonah Hill's weight, making a reference to post-ceremony cup cakes.

If you lose, I think that you should know, that there's cupcakes after the show, Crystal sang to Hill during his song.

Although the tune was all in good fun, some Twitter fans didn't appreciate the humor.

Well 8 minutes in and Billy Crystal has bashed Jonah Hill's weight, one user tweeted.

Billy Crystal just took such a hard blow at Jonah Hill. God damnit that was awkward, wrote another tweeter.

Crystal has hosted the Oscars eight times in the past, the last time being in 2004.