From Zappa Wiki Jawaka
Barry Leef is an Australian vocalist who guested at two of Zappa shows in '73, during the Australia tour.
"We were invited to see "Bakery" at the lovely "Chequers" night-spot. They were doing some of my old numbers; I thought Barry's singing was kinda swift, so i asked him what he was doing for the next six months...
- Frank Zappa, Soundblast August 1973