Freddie Mercury and David Bowie's Isolated "Under Pressure" vocals

These are the isolated vocals from Queen & David Bowie's track "Under Pressure".

Bumping into each other in Mountain Studios in Montreux, Bowie began to collaborate on a track by adding backing vocals, but then decided they should write a brand new one, which they did during a 24 hour booze and cocaine session.

‘When the backing track was done, David said, “Okay, let’s each of us go in the vocal booth and sing how we think the melody should go–just off the top of our heads–and we’ll compile a vocal out of that.” And that’s what we did.’ recalls Brian May. Some of these improvisations, including Mercury’s memorable introductory scatting vocal, would endure on the finished track. Bowie also insisted that he and Mercury shouldn’t hear what the other had sung, swapping verses blind, which helped give the song its cut-and-paste feel.

Not a huge Bowie or Queen fan, but found this story fascinating - read more about this track on Open Culture, and thanks to Bill from God Is In The TV for sharing