Gwen Stefani, reportedly pregnant with her third child, turns 44 today (Oct. 3). She's a stunner even as she is in the midst of her fourth decade, turning heads with her edgy, street fashion style and her natural beauty.

Stefani is a fashion icon, known for her love of reggae-inspired fashions. She is also able to pull off platinum locks and bright red lips with ease. Those are two extreme looks that are better worn apart than together -- except when it comes to the Hollaback Girl. She's so naturally bangin' that she can pair bright hair and bold lips and not look like she is overdoing it.

In honor of the double four, we've decided to look back at some of Gwen Stefani's best hairstyles through the years. The No Doubt frontwoman has played with color -- like pink -- but for the most part, she remains a blonde. But it's how she styles her flaxen locks that impresses us every time.

In no particular order, here's how Gwen has wowed us through the years. Many of these looks are easy to copy, too.

In her "I wanna be Michelle Pfeiffer in 'Scarface'" second album solo artist phase, Gwen rocked heavy bangs and rolled ends. It was one of her best looks... ever! We wish she'd revisit it.

Vince Bucci, Getty Images

Long, wavy layers framed her face -- no soccer mom hair here! This coif was an update of the famed Farrah Fawcett flip.

Jason Merritt, Getty Images

Stefani's distinct, golden finger waves looked like Madonna when she played Breathless Mahoney in the 'Dick Tracy' movie many moons ago. Go ahead. Google it. Or see it here. Are we right or are we right?

Frazer Harrison, Getty Images

Anyone can slick their hair back off her face into a bun. Gwen Stefani took it as an opportunity to plant a garden in her hair. Her hair accessory bloomed. Few stars can pull this off. Gwen can.

Ethan Miller, Getty Images

Baby bangs and a bubblegum pink hue -- this was Stefani in her rebel phase. Given her innate sense of street style, she made this look goooood. On anyone else (other than Pink), this would have been an epic fail.

Brenda Chase, Hulton Archive, Getty Images

Due to some creative styling, Stefani looked like she had a pixie when in reality it was just a clever, deceptive updo. A faux pixie, but cute.

Frazer Harrison, Getty Images

Stefani's massive beehive bun looked like something she could store lip gloss, her wallet, her passport and her young sons in. There was a lot of height and volume at the crown, but she owned this.

Donald Bowers, Getty Images

It's Studio 54 hair, Stefani style. Her frizzy, disco curls, paired with electric pink liptick, were so retro cool.

Pascal LeSegretain, Getty Images

The singer's blownback, Bardot-style bouffant was very '60s. Her smoky makeup gave it a modern edge, but the style shows off the thickness of her strands. Tres chic!

Andreas Rentz, Getty Images

The fashion designer channeled Old Hollywood glam with this poufy updo.

Ian Gavan, Getty Images

The topknot is Stefani's signature style when performing live or running errands. It's keeps her locks out of her face. There is a reason she repeats it -- and that's because it's super cute.

Stephen Lawton, Getty Images

The deep side part and face-framing style made it look like she had an angular bob. We love hairstyle optical illusions.

Andrew H. Walker, Getty Images

Stefani doesn't often go stick straight, but this sleek style was chic just like the woman wearing the look.

Kevin Winter, Getty Images

She rocked a platinum suicide roll... before it become a super popular 'do.

Evan Agostini, Getty Images