"He's quite the boy"
Here's a recent newpspaper feature on Chad Allan, the first lead singer of The Guess Who. Mr. Allan, who I was fortunate enough to know briefly during my teen years, now sings in seniors' homes.
Understandably, the fellow who sang lead on Shakin' All Over includes a couple of uptempo 1950s R and B songs in his set. He also told The Vancouver Sun that as baby boomers age he might be able to include a Beatles or Rolling Stones song in his act.