Yes, Trace Adkins took a bit of a low blow at Blake Shelton this week -- but, we have to admit, it was a pretty funny one!

Shelton's "Hillbilly Bone" duet partner, bent on giving him heck for his recent title of People's "Sexiest Man Alive," unearthed an embarrassing shot of Shelton -- which appears to be a school portrait, probably from his early teen years, complete with eyeglasses and (yep) a fine specimen of '80s-style mullet.

"So apparently Blake Shelton (@blakeshelton) is the world’s sexiest man? Well, I suppose. Never did pay much attention, but then again this picture was taken before he learned how to be sexy from me. Congrats, BS you heartthrob," Adkins joked on his social media accounts. Yeah, he went there!

Shelton has been taking a good amount of ribbing from his colleagues ("Am I being punked?" mused Luke Bryan) as well as weathered debate in general on social media as to whether or not he deserves the honor. He himself has made light of the title ("Wow, we’re down to somebody who is somewhat symmetrical"). However, what matters most is the fact that his significant other, girlfriend Gwen Stefani, seems to be firmly in his corner, saying he's "perfect" for it.

“It’s interesting because I don’t think any of those things like beauty or sexy or whatever way you want to describe humans is necessarily a physical thing that people are attracted to,” she noted. "It’s all about the heart, and he has that big ol’ gigantic heart in there, so he’s quite an attractive human. I’m not the only one that thinks it!" Awww. We bet Gwen would think his teenage photo was pretty cute, too!

The official Sexiest Man Alive issue of People Magazine hit newsstands on Nov. 15.

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