The Cadillacs started out as the Carnations in 1953, but thankfully changed their name. This Harlem Doo Wop group's lead singer was Earl Carroll. His nickname was "Speedo".
That's where this songs most famous line comes from:
Now they often call me Speedo,
But my real name is Mr. Earl...
The Cadillacs were known for their great dance routines. They were choreographed by Cholly Adkins. Cholly would go on to be the choreographer for Motown.
Speedo left the Cadillacs to join the Coasters in 1961.
Last time I saw Speedo, he was on one of the Doo Wop specials that PBS runs during a pledge drive. Still telling folks what his real name is.