They are both singers
Danny Gans Danny Davies Gans (October 25, 1956 – May 1, 2009) was an American singer, comedian and vocal impressionist.
Backing vocalist Backing vocalists are singers who provide vocal harmony with the lead vocalist or other backing vocalists. In some cases, a backing singer may sing alone as a lead-in to the main vocalist's entry or to sing a counter-melody. Backing vocalists are used in a broad range of popular music, traditional music and world music styles.