It depends. She's just a human being so she's not perfect. Plain & simple.
'I don't know J Lo' - Hell no! It's only due to her past issues with Tommy, you can even read that in her eyes.
Didn't have sex with Eminem. It's very personal, and no one knows for sure whether it's true or not. But Eminem seems to be certain about it.
Thinks Britney is a "very nice person". Yes. Why would she lie about this anyway? I remember Britney had a bad reaction against Mariah during her breakdown, but that was just "the dark side of her" cuz she's actually a nice person especially with her fellow singers.
Doesn't care about reality 'TV shows'. It's a lie. She was in talks to join X Factor.
Waited till marriage to have sex with Nick. It's possible and it makes sense actually.
Thinks Madonna hasn't been cool since 'I was in high school'. No. Again, it's a lie.
Facts >>>>> shade
Proofs >>>>>> words.