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Jessica Simpson

Jamie McCarthy/Getty Images for Jessica Simpson Collection

Hard work pays off!

After tweeting a photo from her Weight Watchers commercial Thursday, Jessica Simpson showed off her slimmed-down figure again while promoting her clothing line at Dillard's at International Plaza Saturday in Tampa, Fla.

The singer's sister, Ashlee Simpson, was also on hand for the festivities, wearing a Chanel chain over a loose-knit sweater ensemble.

Meanwhile, Jessica, who appears to have dropped nearly all of her pregnancy weight, a reported 60 pounds, opted for a pink blazer with ripped jeans.

The Fashion Star host gave birth to her daughter, Maxwell Drew, May 1.

Talk about a hot mama.