The 29-year-old "Just the Way You Are" singer took to the stage in a full set of hair rollers, definitely making for one of the most bizarre beauty trends we've seen in a while.
Though this isn't the first time the usually stylish star has rocked the rollers look.
He also wore the style in the music video for "Uptown Funk" in a scene when he and Mark get their hair done together at the salon.
... At least now we know how these flawless curls are achieved!
ET caught up with The Voice season seven finale coaches ahead of Tuesday's performance-packed finale, when they talked candidly about whether or not the hit NBC show had the ability to produce the next Kelly Clarkson, who famously got her start as the first American Idol champ.
Plus, see more celebrity hair transformations: