This clip is not from Your Show of Shows. It's from the next series Sid Caesar (and some of the same supporting cast) starred in — Caesar's Hour. This is from the April 25, 1955 with Sid, Carl Reiner and Howard Morris as The Haircuts. It'll give you a pretty good idea of the way America viewed most of the rock 'n' roll groups then in that pre-Beatles era. And no, apart from Sid's solo spots, I don't think that's them singing…