i think that was very professional of her. That's how u know she has real talent and not just trying to ride off the coattails of her sister's fame. She sang without the music when technical difficulties started. And she was very down to earth with her fans and took everything in stride. she could've just stood there until they fixed the music but she didn't. And that fan was mentally handicapped not drunk or high (drunk or high alters your balance and he was dancing all around and didn't get dizzy and lose his balance not once.... think, guys) and she just made his day by letting him stay on the stage. He didn't try to grab her or fondle or harm her, he just danced with her. That just showed a lot about her personality and she won over a lot of fans with that one.