LeAnn Rimes -- Unstable on Stage at 'X Factor?'

LeAnn Rimes Unstable on Stage at 'X Factor?'

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LeAnn Rimes took the stage on "X Factor" last night, and delivered a weird performance that has a lot of people wondering if she hit the bottle before taking the mic.

LeAnn joined finalist Carly Rose Sonenclar for a duet. The good news -- Carly Rose did great. But when LeAnn chimed in, she looked wobbly and seemed to meander as the song went along.

At one point, LeAnn clutched Carly Rose, arguably to maintain her balance.

Check out the video, and then, we gotta ask ....