Acronym Soup: B/C?

Questions

which band's drummer stayed with them even after he lost one of his arms?

which beatle formed the group "wings"?

Which blues artist toured with u2 in 1989 throughout australia?

which canadian songstress won the eurovision song contest in 1987 singing for france?

which cher video was restricted to night play on mtv because of her rather revealing outfit worn in the video?