Backing vocalists sing with the lead vocalist.
The Beatles were also known for their close style of vocal harmonies  all of them sang both lead and backing vocals at some point, especially John Lennon and Paul McCartney, who frequently supported each other with harmonies, often with fellow Beatle George Harrison joining in
With the exception of a few songs on each album, Michael Jackson, Prince, Dan Fogelberg, Eddie Rabbitt, David Bowie, Harry Nilsson, and Richard Marx sing all of the background vocals for their songs

