McCartney Times

THEY’RE used to taking centre stage and releasing songs and albums with their names all over them.But, back in the day, it was common practice for artists to help each other out. If they had time, they’d jump in the studio and casually record some backing vocals to add to tracks.It might drive you crazy listening out for these secret collaborations, but you’ll soon hear how important they were to the final track.

Source: Michael Jackson, Jay-Z and Paul McCartney — the guest musicians you didn’t know about