Billy Murray leads off the singalong, & you can hear him singing in the background. They should have let him do a solo as this was one of his best recordings "back in the day".
All the people in the movie theatre would sing along with the bouncing ball. In front of the television is where I sung along with the bouncing ball, at
This actually was originally released on January 3rd, 1930. True, Bimbo did officially debuted a couple of months later in the Talkartoon, Hot Dog. But his origin dates back to during the Out of the Inkwell days. When he was Fritz the Dog. So, I'll say that this was probably, one of if not, the last appearance of Fritz, before Bimbo arrived.
@TeamRocket2010 I think this might actually be a Bimbo prototype as Bimbo's first appearance was a year later in the Talkartoon HOT DOG (I actually have this cartoon in my video uploads set if you want to watch it).