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Blake Lively, Mandy Moore, Drew Barrymore

AMANDA SCHWAB/Startraksphoto.com; Dave Allocca/Startraksphoto.com; Michael Williams/startraksphoto.com

Hollywood's biggest stars are seeing red!

Gossip Girl's Blake Lively ditched her buxom blond babe thing and debuted a shocking new strawberry mane last night.

And she's not the first actress to hit the dye bottle...

Mandy Moore recently swapped out her brunette locks for an auburn shade, which she debuted at an ASPCA event in New York City, while red carpet chameleon Drew Barrymore—who has gone from brunette to blond to black and back again!—showed off her latest hair incarnation at an L.A. book party two weeks ago.

We're loving the hue on Drew most, who looks like she could've been a natural redhead.

Who's your fave? Weigh in below!

WATCH: Drew and ex Justin on the red carpet