White hot mama!

Jessica Simpson retweeted a picture of herself rocking a sexy swimsuit on Twitter Friday (Nov. 15). The singer-turned-fashion mogul, who welcomed her second child, son Ace Knute, in June, posed in the one-piece during a photo shoot for the Jessica Simpson Collection.

Simpson, 33, who is also mom to daughter Maxwell, 19 months, has been open about losing the baby weight, telling MomFeeds last month, "I'm a lot more confident this time around. With Maxwell I didn't think about the weight I was gaining, and the first time I stepped on a scale and looked at the number ... I mean, that wasn't a number I had ever even considered ... and I was faced with a pretty serious truth."

"But since I had already done Weight Watchers, I didn't put on as much weight with Ace," she added, "and I just know a lot more now."

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