"You know, I said this in the magazine when I did my interview for Sexiest Man Alive, that I've been fat and ugly my whole life and if only for one year I get to be sexy, I'm going to milk this for everything that it's worth," the country music star told Ellen DeGeneres Thursday.
"I do not recognize Blake Shelton as our crowned sexiness king," Colbert said. "He may have won the sexiness electoral college, but not the sexiness popular vote."
In any case, Shelton is taking advantage of the honor to bring back a dated hairstyle from his teenage years -- the mullet.
"The mullet's coming back this year," he told Ellen as she flashed pictures from Shelton's past on the screen behind him. "That used to be ugly, it's officially sexy now. It's the law now. It's like the sun coming up. I'm sexy."
Ellen asked if his old hair style was inspired by Billy Ray Cyrus, to which Shelton responded: "When I think of sexy, I think of my heroes and Billy Ray Cyrus -- I can't think of anyone else with a mullet."