As Buddy Rich, for instance, broke into the business at the age of three, I think it was, on drums, so indeed did I break into the business at the age of four as a singer. ↗
How many radio shows I did is lost to memory now; it's in the hundreds - maybe even close to being in the thousands - for the span of years from the time I was eight till I was about fifteen. ↗
I didn't really have an act per se - a theatrical performance, as opposed to just: here I am, folks, and you're all supposed to be dead quiet while I sing eight or nine songs, then get off the stage. ↗