Season 1
Baby Olivia Benson before lots of layers.
Season 2
She means business.
Season 3
She really means business. Hargitay said this haircut almost got her fired.
Season 4
The Justin Bieber before Justin Bieber was a thing.
Season 5
She's looking for the scissors.
Season 6
This is kind of quintessential Olivia Benson.
Season 7
Remember this episode where she talked to a girl on the phone the whole time?
Season 8
Bangs!
Season 9
Post-baby (in real life), sassy new 'do.
Season 10
Werkin' that bridge.
Season 11
Classic later seasons Liv look.
Season 12
No blunt haircuts here.
Season 13
The first season without Stabler, Liv let her hair do the talking.
Season 14
Look at those waves.
Season 15
After being held captive and tortured, Benson chopped off her hair.
Season 16
Benson became a sergeant in season 16, you can tell by the "I'm in charge" look on her face.
Season 17
No more waves, Benson's gone pin-straight and down the middle for season 17.
Season 18
This isn't your typical mom 'do.
Season 19
She's sarge and in charge. Not a drastic change to season 18, but there are more choppy angles here.
Season 20
Sleek and simple. Still similar to her previous seasons look, but with a middle part.
Season 21
Just a casual windswept moment.
Season 22
Did we shamelessly use this selfie as a way to work in a Stabler and Benson reunion moment? Why yes, yes we did.
Season 23
We need the number of Hargitay's hair colorist.