Jessica Simpson showed off new curves as she performed in a concert over the weekend at Sunday's Radio 99.9 Kiss Country Chili Cook-off at Pembroke Pines, Fla.

The singer, 28, bounced on stage in high-waisted jeans and a black vest, as she sings 'Do You Know' from her country album, Us Weekly Magazine reported.

I'm a nervous eater and this tour has made me a nervous wreck, she said back in September.

Curves are better, Simpson later added. I don't get the whole rail thing. It's not good for your heart, it's not good for your mind; it's emotionally destructive, it really is.