It's embarrassing because I don't think she's a particularly great musician, I'm just a sucker for sexy, sleazy women.
I actually thought she sounded good live and it's what initially sold me on her, but I've only seen her performance at the MTV Movie Awards. It sounded more authentic than what's on record, which I think is mostly overproduced for her style and a bit hammy with the shtick. I've read that her first album is better, but I haven't been able to find it anywhere (with a decent bitrate).