R&B crooner and The Voice's vocal coach Usher ended season 6 of the Voice with two unique performances. Usher took the stage to perform a special cover of D'Angelo's "Untitled (How Does It Feel)" with fellow coach Adam Levine. He also collaborated with team member Josh Kaufman for a cover of the Police's "Every Breath You Take." Adam gave fans a nice gritty soulful intro along with a nice guitar riff. Usher jumped in with his notable tenor. D'Angelo is known for his unique runs, range, and voice inflections. Usher and Adam nailed it. Check out the videos below.