Who was the lead singer on the Commodores' hit, "Brick House?"

Lionel Richie

I LOVE that thumb.

Thought I'd save you the trouble and give myself a thumbs up

The lead singer on "Brick House" was Walter Orange.

That's the one, Georgia! I was watching a PBS special on 70s Soul when I wrote the question. There's no mistaking that voice.
"...That was extraordinary drummer Walter "Clyde" Orange, who was their first lead singer (that's his voice you hear on the smashes "Brickhouse" and "Too Hot Ta Trot")." - Amazon.com Customer review