As the cover girl for the December 2009 issue of Women's Health magazine, Ashlee Simpson shows off her slim body and defends her big sis Jessica's curves.Ashlee-SimpsonAshlee told Women's Health,

My sister has an incredible body. I feel sorry for anyone who would judge her, because she's one sexy lady. It's disgusting that people would say those things.

When it comes to her own body Ashlee says,

Pete isn't worried about stretch marks. He always makes me feel sexy.There's gonna be a time when I'm way curvier, and that'll be sexy too. What defines sexy is not someone's weight. Personally I like curves... I wanna look good [for me]. I wanna feel good.

Personally I think curvier is sexier than skinny.[gallery]What do you think?