The statement jacket may have also been a dig at his haters, who popped up in droves after Shelton was named Sexiest Man Alive last month by People.
The "I'll Name the Dog" singer's girlfriend, Gwen Stefani, was quick to defend her beau, however, telling Ellen DeGeneres, "If you think about it, what defines sexy? It really is so personal, you know what I mean? For me, it's just that big ol' heart and that sense of humor. He doesn't even take himself seriously, and he's just such an incredible person. And that's sexy to me."
Kelly Clarkson -- who performed her new single, "Medicine," for the first time on TV during The Voice finale -- also spoke up for her pal, telling ET, "He's sexy. Let him be sexy!"
Shelton wasn't the only coach to make a major fashion statement during the finale.
Miley Cyrus looked positively ethereal in a flowing rose-hued tulle Nicolas Jebran gown with bright floral appliques at the shoulders, a look that gave off butterfly vibes.
And Jennifer Hudson rocked a long-sleeved metallic purple dress with major ruffle detailing. She even showed off the fun frock before the show, posing for a sweet pic with Shelton and Adam Levine that she shared to Instagram.