Y'all can stay hating on her singing but we all know it's gonna be on the album whether you like it or not. Personally I love her singing voice and you can't really say she's a bad singer when even live she sounds better than a lot of the pop girls.
Comparing her valentines pictures from last year to ones in Mexico
:P
Her butt only looks smaller in the bikini pictures from Cabo because of the way she's posing and the angle they were taken at, it really hasn't gotten any smaller since last year.