Frank Ocean's vocals are on Travis Scott's Astroworld track "Carousel".

But if Frank has his way they won't be for long. Ocean has hit Scott with a cease and desist, demanding he removes the vocals from the track.

They've been fighting behind the scenes since before the Astroworld dropped. Ocean, a known perfectionist, is furious that his vocals have been changed. Ocean's voice is auto-tuned at times and it sounds like the pitch has been manipulated in the third verse, as compared to the chorus. 

According to TMZ, Scott has no plans to remove the vocals. So it will likely be up to a court to decide.