G loves her pin-straight ponytails!
This slightly mussed-up look is also pretty hot.
Barrel curls were all the rage for Giuliana in 2009.
The star attended the 2008 Grammys with sexy, voluminous waves.
This half-down, half-bouffant look is hard to pull off, but G managed to!
The star went nearly black with her locks (and super, super straight) back in 2007.
A chignon with face-skimming bangs is one of G's go-to awards show looks.
The E! Live From the Red Carpet host opted for a long bob (before lobs were even, well, a thing) in 2006.
This flattering cut is the perfect showcase for Giuliana's ultra-healthy locks.
A simple side-part and end curls do wonders for G.
Chestnut highlights make this long, straight look a standout.
Trading hair hues! Once again, G's back to brown.
This honey-hued look is perfect for the SoCal girl.
Pile on the layers!
Back to brunette! Giuliana sported a glossy chocolate hair hue and just-below-the-shoulders cut.
Long layers and a golden blond hue made our girl's skin glow even more than usual.
Back in 2003, G sported buttery highlights and an easy-to-DIY pony.