Sources confirm to UsMagazine.com that Jessica Simpson, 30, became engaged to beau Eric Johnson on Thursday, just days after Us broke the news that her ex-husband, Nick Lachey, popped the question to Vanessa Minnillo, his love of nearly five years. Simpson and Lachey, 37, split in 2005, after three years of marriage.

On Saturday, Simpson flashed a sizable ring on her left hand during an appearance at Dillard's at Oak Park Mall in Kansas City.

The Texas native began dating the former NFL player in May while he was estranged from his first wife, stylist Keri Johnson; their divorce was finalized five months later.

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