debaser_1985 is correct; "Derek and the Dominoes" had Eric Clapton as its lead singer. There was no actual Derek.
Also, Janis Joplin was never connected with any group called "Building Company" (nor can I find any indication that such a group even existed). Janis Joplin worked with "Big Brother and the Holding Company" on a couple albums, but as both she and they had separate careers afterward, it'd be a bit of a stretch to call them her backup band. |