Taylor says she enjoyed spending time with Pharrell while taping her portion of the show, calling the star producer "a sorcerer of happiness." Taylor joked that anyone who talks to Pharrell ends up feeling "really good for about two weeks straight."
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Pharrell has teamed up with other pop stars of Taylor's age in recent years, including Taylor's good friend Ed Sheeran.
Swift will be serving as this season's "key advisor" on "The Voice," working with the aspiring singers on all of the coaches' teams. She'll make her debut on the NBC show on Monday October 27th, the same day her album 1989 arrives.