It's fun sometimes to find out how a group got it's name. The guess Who actually started out as Chad All & The Expressions. The Expressions recorded a cover o f Johnny Kidd & The Pirates "Shakin' All Over" in 1965, which became a  hit in Canada and reached the U.S. Top 40. When the Expressions recorded an entire album of the same name, its record company, Quality, listed their name as "Guess Who?" on the jacket, hoping to fool record buyers into thinking that the British Invasion-influenced music was actually by a more famous group in disguise.