It may have been the GQ Men of the Year Awards -- but it's two women who stole the show!

Singers Jessie J and Lana Del Rey both showed up to the London event sporting some surprising makeovers ... and both looked great.

While "Domino" singer Jessie J is known for her crazy outfits, ridiculous makeup, short black hair and blunt bangs, she was completely unrecognizable at today's event.

Instead of the dark locks, Jessie went lighter with a short brunette 'do and more natural makeup. She finished off her look with a sexy tuxedo jacket dress that showed a lot of leg.

What do you think of her makeover? We're loving the more natural look on her.

And while Jessie went lighter, Lana went to the dark side.

Though keeping her retro styling, the "Video Games" singer stepped out with black hair -- a far cry from the auburn look she's been rocking since she first stepped onto the scene.

How about Lana's new 'do? Loving that too?

Sound off below -- and check out more red carpet photos from the event, including shots of Katherine Jenkins, Olivia Munn, Kylie Minogue and more, in the gallery above.