AceShowbiz - In honor of Throwback Thursday, Gwen Stefani just reminded Blake Shelton of his long affair with mullet. The co-founder and lead vocalist of No Doubt took to her Instagram account on September 19 to share an old photo of her boyfriend rocking his infamous long curly do.

The country music star looked proud as he posed with his arms crossed in the black-and-white image. He sported an unbuttoned checkered shirt on top of a T-shirt. Hinting that she would've fallen for Blake if she had met him with this hairstyle in the past, the "What You Waiting For?" hitmaker captioned the photo, "@blakeshelton wish I would've met u sooner."

It's not clear when the photo was taken, but Blake had this "business in the front, party in the back" hairstyle during his high school in the early 1990s. Gwen previously trolled the "God's Country" crooner over the same hairstyle in 2017 by changing her Twitter profile picture to an old shot of her boyfriend sporting the long flowing curls with blunt bangs and sideburns.

While Gwen didn't say that she doesn't like Blake's mullet, the 43-year-old singer himself has admitted that it's not his best hairstyle. "I mean, that is ridiculous," he said on "Today" in summer 2016. "Why didn't my family or friends or somebody tell me how stupid I looked?" He went on revealing how his long, ugly locks affected his love life at the time. "There were no girls in my life at that point - I can promise you that," he shared.

Gwen and Blake started dating in 2015, after they met on the set of "The Voice", where they served as coaches. The blonde beauty just announced her divorce from her longtime husband Gavin Rossdale at the time, while Blake split from his second wife Miranda Lambert earlier that year.