backup singer
backing vocalist
back singer

If it wasn't for the backup singers, her singing alone is a mess.

She started out as a backup singer in local bands.

During the 1970s, Sylvia found work as a backup singer.

Before this encounter, she had been a backup singer for many other artists.

She and her backup singers are the only ones dancing.

In the end, ten dancers and two backup singers were used.

In the last decade, he sometimes still does this show, with his wife and daughter as backup singers.

"The backup singers had just done their part," she says.

Dennis was a backup singer for Dylan from soon after they met in 1978 until 1987.

At the end she is joined by her backup singers and dancers.