This ain't going to put it to rest but it bears repeating.
I was with the media at a concert she was performing in New York. Before the show she got on a piano and started messing around. She was perhaps one of the most talented players I'd ever heard or seen. When she's not exaggerating herself onstage and in the public eye, at her core, she's probably one of the most creative and naturally gifted musicians there is.
Now, does that excuse her behavior? No. It's obvious to me that since she's been famous she's just trying to one-up herself and has taken complete disregard for anyone or anything, as evidenced by her behavior at Yankee Stadium/Citi Field at Yankee/Mets games as well as playing a piano owned by legendary John Lennon without permission. Her over-the-top outfits and how she carries herself is just a cry for attention which she would get if she focused more on her music and less about being in the tabloids.