S-X, the British producer who has worked with Lil Wayne, T.I., Iggy Azalea, Lupe Fiasco and more, just leaked an unexpected collab with Childish Gambino today, which he says was supposed to drop over a year ago. 

"I was going to drop this song over a year ago but things stalled so I leaked it. It was supposed to be my first single but whatever, it still can be," he said on his Soundcloud. S-X’s Two EP is out now. Read his latest interview with Do Androids Dance here.