Victoria Beckham might have the hottest post-baby body in Hollywood!

The 37-year-old fashion designer welcomed her fourth child, daughter Harper Seven, in July 2011 -- but few would know it based on her sultry new photo shoot for Numero's March issue.

Wearing a white corset by Rochas, the former Spice Girl strikes a confident pose for the Japanese magazine. Ironically, Beckham says she's quite shy in real life -- especially when it comes to her soccer player husband, 36.

"David has never been to any of my shows as I'm incredibly nervous and I need to focus and concentrate," the fashion designer explains.

The L.A. Galaxy star isn't the only person who makes Beckham unnerved. "Tilda Swinton is so striking and I would love to dress her," she tells Numero. "She's incredible looking and I love that she seems so confident in herself she doesn't feel the need to conform."