Hilary Duff was turned "into a mermaid" last night ... circa May 2014. Thoughts on this hair transformation? I kind of love it, even though I maybe feel like I shouldn't because Lizzie McGuire ...

Just six weeks ago, when she tied the knot with Mike Comrie, Hilary Duff was still a dyed-and-true ... Do you think Hilary should keep the brunette hair, or do you prefer her as a blonde?

Duff kept it casual in a sweatshirt, leggings and shades as she showed off her edgy new hair color. Hilary is no stranger ... transitioning her look to a pink ombre hairstyle.

10. That one time, over a decade ago, Hilary was a child of glam and cuteness who showed us how to get the perfect ’90s hair. More celebs are doing plastic surgery reversals.

The actress showed off her newly-dyed teal tresses (reminiscent of Kylie Jenner's blue ombre locks ... a white T-shirt and white pumps, Duff's bright hair definitely stole the spotlight in ...