Since Pharrell Williams is joining The Voice this fall, it's only natural that NBC would use "Happy" in a promo for the singing competition's new season.
In the 30-second clip , we see Pharrell and fellow Voice newbie Gwen Stefani posing and sharing laughs with returning coaches Blake Shelton and Adam Levine . Gwen and Adam are also teaming up musically; she appears on Maroon 5 's upcoming album V.
The seventh season of The Voice begins September 22.
Gwen and Pharrell are taking over the rotating chairs from Shakira and Usher .
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