The Guess Who had their origins as Chad Allan and the Reflections in 1965, with a triple eyewear hit as pictured aboved. As a publicity stunt, Quality Records released promo copies of their single, "Shakin' All Over" as credited to "Guess Who?".
By default, this became the band's new name, although they were still being credited as "Guess Who? Chad Allan And The Expressions" throughout 1965.
The 1969 ballad "These Eyes" was the group's first Top 10 US hit for their new label RCA Records. By the 1970s, they had moved toward an edgier hard-rock sound with the album American Woman. "American Woman" earned The Guess Who the honor of being the first Canadian band to have a No. 1 hit on the American charts.
Enjoy them here in their 1972 televised guest appearance on Burt Sugarman's Midnight Special.