You would think you would have to be a great singer to be an "American Idol" finalist, not just be a superstar at karaoke.  But Haley Reinhart couldn't even do that during a performance at a hotel in Hollywood last weekend.

Haley was performing "I Want You Back" by the Jackson 5  and from the beginning she was stumbling over the lyrics.  She spent most of the song trying to read them off her phone and taking a little heat from the crowd.

Funny that she could do so great in front of millions on a Thursday night on National TV and blow so bad in a small room.

Check out the massacre:

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