The X Factor judge will make a guest appearance on Ryan Murphy's musical series, in which she will play a love interest for Naya Rivera's lesbian character Santana Lopez.
Leaking the news at the MTv Video Music Awards on Sunday (25Aug13), Rivera told Gossip Cop, "She's playing my (character Santana's) love interest so I'm very, very excited about that.
"We get to sing a song together... I'm excited to work with her. We're bringing her to the dark side."