Believe it or not, Heidi Klum is celebrating her 40th birthday today. The model, TV host, fashion designer, and mother of four proves she has good genes by looking just as good now as she did when she kicked off her modeling career in the early 90s.

Klum was born in Bergisch Gladbach, a small city near Cologne, Germany, in 1973. She was one of the original Victoria's Secret Angels and has been featured in the Sports Illustrated swimsuit issue. In 2004 she launched "Project Runway," which completed its 11th season in April. The series has also had two all-star editions.

She has joined the judging panel of the upcoming season of "America's Got Talent," which kicks off its 13th season on June 4.

The supermodel has a daughter with Formula 1 driver Flavio Briatore and three children with her estranged husband and singer Seal. She is currently dating her former bodyguard.

In 2011, Klum was ranked second behind only Gisele Bündchen on the Forbes list of top-earning models with estimated annual earnings of $20 million.

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