The Rivingtons were a doo-wop group noted for being one of the most loud and raucous of the genre. Their first hit, "Papa-Oom-Mow-Mow" (1962), like many such songs, began with the bass chanting nonsense syllables (in this case the title), followed by the tenor singing over repetitions of it. "Mama-Oom-Mow-Mow", an even more baroque rewrite of the theme, failed to sell, but they returned to the charts the following year with the similar "The Bird's The Word".
These are photos from concerts where The Rivingtons played, so they may be of other bands that played the concert as well.
Lovin' Spoonful / Cannibal and the Headhunters / The Rivingtons Jun 16, 1966 Long Beach, California, United States Uploaded by Sundae