Jessica Simpson Shocks Fans With Noticeably Fuller Figure

Once renowned for her famously taut abs and sculpted legs, it seems that country singer Jessica Simpson has eased up on her fitness regimen a bit.

The former “Newlyweds” star and ex-wife of Nick Lachey showed off her noticeably fuller curves at the Radio 99.9 Kiss Country's annual Chili Cookoff in Florida Sunday.

VIDEO: Click for video of Jessica at the Chili cookoff.

Donning mom-jeans, a tight black tank top and a muffin-top-inducing leopard belt, the songstress' appearance left the gossip-world abuzz.

Is Jess preggers? Did she gain sympathy weight for sis Ashlee (who just had a baby with hubby Pete Wetnz)? Is it all a ploy to get her on the cover of a magazine? Or is it, more likely, that the star has been eating the same diet that her Dallas Cowboys quarterback boyfriend Tony Romo does?

PHOTOS: Click for pics of Jessica's new physique.

Indeed, the singer even admitted that she and Romo love to have “movie nights” where they cook and order in.

Still, don’t expect the singer — who seemed as happy as ever as she dedicated her performance to Romo — to be down in the mouth about her fuller frame.

PHOTOS: Click here to see Jess' fellow weight-mates who have gone through ups and downs over the years.

She famously told Harpers Bazaar magazine that she prefers curves on a woman to a super-skinny frame.

“Curves are better,” she said. “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.”