'The Voice': Gwen Stefani and Pharrell perform 'Hollaback Girl' | EW.com

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'The Voice': Gwen Stefani and Pharrell perform 'Hollaback Girl' -- VIDEO

Gwen Stefani Pharrell

(Trae Patton/NBC)

Gwen Stefani and Pharrell Williams are joining The Voice as coaches next season – and they went on the show Monday night to give everyone a taste of their skills. Naturally, their performance was bananas. (B-A-N-A…you know the rest.)

The two performed Stefani’s 2005 hit “Hollaback Girl,” which was co-written by Williams. Synergy! Check it out below: