The Dirty Mac

The Dirty Mac was John Lennon's temporary supergroup organized in December 1968 that featured Eric Clapton, Keith Richards, Mitch Mitchell and Lennon under the nom de plume of Winston Leg-Thigh. The band assembled for a one-off performance on the Rolling Stones' TV special titled The Rolling Stones Rock and Roll Circus. The Dirty Mac played Lennon's Beatles composition "Yer Blues" and "Whole Lotta Yoko", an extended blues improvisation in which they were joined by Lennon's then-girlfriend Yoko Ono and violinist Ivry Gitlis. The TV special, which included appearances by the Rolling Stones, the Who and Jethro Tull, among others, did not air as originally planned and was not released officially until October 1996.

Biography summary from English Wikipedia, photograph via Wikimedia Commons.