Watch Grimes Debut a Song She Wrote for Rihanna
During her set at this weekend's Governor's Ball, Grimes performed three new songs, including "Go," which she revealed in a tweet that she and Blood Diamonds had originally written for Rihanna. RiRi, however, turned it down. Her loss, because it's a jam. Watch Grimes perform it in the video above.
Thumbnail photo of Grimes by Eric White.