How is it that celebrities seem to return to their old selves’ just weeks after giving birth? Nicole Richie, seen here on Feb. 9, three weeks after giving birth to daughter Harlow, may have a little help in looking so fabulous.

A pal of Richie tells OK! Magazine that she wears Spanx shaping garments. “She sometimes wears two pairs at a time,” the friend reveals. She doesn’t hide her slimming secret from her fiancé, rocker Joel Madden. “He’ll help her find them in her closet if they’re running late” the friend says. “But he thinks she looks great just he way she is.”

Pick up the Slim Cognito Seamless Shaping Bodysuit ($62) at spanx.com.

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