Jessica Simpson Models A Swimsuit From Her Spring 2014 Collection

The weather might still be frigid this January, but Jessica Simpson is ready for the sun.

Simpson slipped into a white swimsuit for her Spring 2014 Jessica Simpson Collection ad campaign. In the photos, the 33-year-old poses in a white retro bathing suit with sunglasses and a pink wide-brimmed hat.

“I love the new swimwear we have coming out ... This swimsuit is feminine and a little retro in its detailing," she told People Style. "It’s very sexy, but it still leaves something to the imagination. And the shape is incredibly flattering.”

Simpson has been doing Weight Watchers since giving birth to her second child, Ace, in June. She said that her upcoming wedding to fiance Eric Johnson is keeping her motivated.

“Knowing that I have the wedding coming up is definitely incentive to stay on Weight Watchers, keep counting my points and stay in the gym," she said in a recent ad for the company. "I mean, when you see my dress, you’ll know.”