Gwen Stefani Makes Flashback Photo of Blake Shelton's Mullet Her Twitter Profile Pic

The No Doubt rocker is really digging her boyfriend's old 'do.

Before Blake Shelton met Gwen Stefani, his hairstyle was all business in the front and a party in the back.

On Throwback Thursday, Stefani seemed quite taken with the mullet her boyfriend used to rock, and tweeted a photo of the 40-year-old country crooner from back in the day. She even went so far as to make it her new profile pic on Twitter. The photo is so good, we may all want to make it our profile pic.

Stefani and Shelton are currently coaches on The Voice, and the 47-year-old No Doubt rocker admitted to ET that she was "nervous" to return to the show after the two started dating. "I was like, 'This is going to be weird!'" she said. "But, you know, the show is so real. All it is is us just being there and being us. So, it's been really fun."

WATCH: Blake Shelton Offers to Propose to Gwen Stefani on The Voice

Shelton also joked with ET that the competition is fierce despite his relationship with Stefani. When asked what would happen if there were a Team Blake-meets-Team Gwen steal, he quipped, "She is sleeping on the couch, that is what happens. She will be in the dog house."

WATCH: Gwen Stefani Gushes About Boyfriend Blake Shelton, Reveals the One Thing That Was Almost a Deal Breaker