Jeff Dunham has so many clips on YouTube. He is a renowned ventriloquist.
In this video, the singing guy is Bubba J. There are three other characters who pop in and out of the video, and they are all Jeff's trademark puppets. The purple is Peanut, the skeleton is Achmed and the third is Walter.
There are many others in this world as well. But only a handful of people get famous. There was someone in pakistan, I think in one of Uncle Sargam's program, who used to do that same.