VIDEO: Usher & Adam Levine Take on Stevie Wonder on THE VOICE

On last night's The Voice on NBC, coaches Adam Levine and Usher delivered a powerful one-two punch with their take on Stevie Wonder's classic "Superstition." Check out the performance below!

"The Voice" returns with the strongest vocalists from across the country invited to compete in the blockbuster vocal competition show's fourth season. Celebrity musician coaches Adam Levine and Blake Shelton return along with new coaches, Usher and Shakira, while Carson Daly continues to serve as host and Christina Milian as social media correspondent.

The show's innovative format features four stages of competition: The first begins with the blind auditions, then the battle rounds, the knockouts and finally, the live performance shows.

During the blind auditions, the decisions from the musician coaches are based solely on voice and not on looks. The coaches hear the artists perform, but they don't get to see them - thanks to rotating chairs. If a coach is impressed by the artist's voice, he/she pushes a button to select the artist for his/her team. At this point, the coach's chair will swivel so that he/she can face the artist he/she has selected. If more than one coach pushes his/her button, the power then shifts to the artists to choose which coach they want to work with. If no coach pushes his/her button, the artist is eliminated from the competition.

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