Supermom Beyoncé Knowles is finally spilling the beans on how she snapped back into tip-top shape in just three months after giving birth to daughter Blue Ivy last January.

The singer covers the April issue of Shape magazine in a bright color-blocked bikini, revealing her stay-fit secrets in a behind-the-scenes video for the cover shoot (below).

“I gained 57 pounds when I was pregnant,” Beyoncé said in the clip. “I didn’t have a lot of time to lose the weight, because I scheduled a show three months after I gave birth, which I would never do again.”

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