Heidi Turns the Big 4-0

at 6:50 pm | By

How time flies! Even in the world of supermodels and fashion.

The beautiful Heidi Klum celebrates her 40th birthday on Saturday.

While the German beauty spent her big day with her four children, beau Martin Kristen and a giant party hat, Celebuzz is celebrating Klum’s big day with a look back at her year in fashion.

It’s only June, but the new judge of America’s Got Talent has already turned heads in Julien Macdonald, Marchesa and most recently, in Atelier Versace at an event for Germany’s Next Top Model.

See how Klum spent her special day, in the gallery, below, then check out her best red carpet looks from 2013 (so far), in the album above.

Happy 40th, Heidi Klum!