JUST WRONG! CEE LO SINGS F**K YOU AT OBAMA FUNDRAISER!

Cee Lo Green went a little blue at a fundraiser for President Obama over the weekend.

The Gnarls Barkley singer dropped f-bombs and flipped off the crowd during a peformance of the R-rated version of his hit song “Forget You” at the Atlanta event on Friday.

Video clips from the event showed Green giving the crowd the middle finger during the song's opening bars, asking "Can I cuss?" and then shouting an exuberant "F- you!" into the mic.

"The Voice" host later tweeted that he made "a mistake" after a Twitter follower told him he "had no class."

He wasn't too broken up about it.

"All of you heard the song a thousand times so don't get all saint on me," Green quipped.

President Obama wasn't at the event when Green performed.

Green landed in hot water on New Year's Eve when he tinkered with the lyrics to the John Lennon classic "Imagine" during a live performance in Times Square.

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