A fresh-faced brunette, here is Heidi just before she became a huge name on the fashion scene.
A beaming smile accents Heidi's shaggy bangs.
Heidi pumped up her lighter locks with voluminous curls.
Heidi's sleekest look yet, with side-swept bangs and bright highlights.
Can you say "beach babe?" This bleach-blonde blunt cut made its debut in the summer of 2003.
A little bit longer now! This mod one-length bob is one of Heidi's trendiest hairstyles.
We love Heidi's lightly layered 'do with natural waves and sunny highlights.
This edgy updo with sexy, kohl-rimmed eyes is a fierce, fashion-forward look for the Project Runway host.
How romantic are Heidi's longer locks with soft waves?
Always a trendsetter! Heidi was rocking a braid crown years before they were all over the red carpet.
This layered, long bob frames Heidi's beautiful face nicely.
This slicked-back, asymmetrical bob is giving us futuristic vibes.
We think Heidi looks super cute with this choppy bob, don't you?
Only someone as gorgeous as Heidi could pull off this au naturel look on the red carpet. She's flawless!
Here, Heidi demonstrates Old Hollywood glam at its finest.