Heidi Klum Turns 42: See 21 of Her Best Beauty Looks Ever

It's hard to believe Heidi Klum is turning 42 today! The ageless supermodel is looking better than ever and that's after having four kids, serving as host on several TV shows, and launching a lingerie line. Klum remains the epitome of poise and beauty, and is always ready to document her daily doings on Instagram (with regular throwback snapshots to boot!), giving fans an inside look at her personal life and career.

As we gear up to binge-watch Project Runway in honor of the German beauty's birthday, we're also taking a look back at her best beauty looks, from 1998 to present day.

PHOTOS: Heidi Klum's Most Memorable Beauty Moments