She’s barely given birth to her fourth child, Lou Sulola Samuel, but Heidi Klum‘s business empire keeps on growing. Next up? The Project Runway host is bringing out a fashion label of her own.

The supermodel-turned-mogul is producing a line (currently untitled) that will cover footwear, activewear, dresses, swimwear and maternity fashions.

WWD reports that Heidi has teamed up with Modern Vintage and Majestic Mills co-founders Rick and Brian Cytrynbaum to launch the line with a fall 2010 shoe collection.

She’ll have a Project Runway challenge of her own to create 48 styles ranging from stilettos to boots.

“It’s the whole ‘Heidi’s closet’ concept,” said Rick Cyntrynbaum. “It’s feminine with a bit of a fashion and rock ‘n’ roll edge.”

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