Please Welcome to the Stage: Every Single Surprise Taylor Swift Guest

Who?! Uzo is an Emmy award-winning actress, best known for playing "Crazy Eyes" on Orange Is the New Black. She also recently got cast in the live production of The Wiz.
Where?! Uzo first joined Taylor in New Jersey, but when she came back for the LA show, she actually performed a song.
Why?! We don't really know how these two know each other, but Uzo is insanely talented, so we're totally on board with this.