The Guess Who were a Canadian rock band from Winnipeg, Manitoba. Produced by Jack Richardson, C.M., they were the first Canadian rock group to have a No.1 hit in the United States. The Guess Who started out as a local Winnipeg band formed by singer/guitarist Chad Allan in 1960 and initially called Al and the Silvertones. This was changed to Chad Allan & the Reflections in 1962, by which point the band consisted of Chad Allan (vocals/guitar), Bob Ashley (keyboards), Randy Bachman (guitars), Jim Kale (bass), and Garry Peterson (drums). All the band members were born in Winnipeg.

The band's debut single ("Tribute To Buddy Holly") was released on Canadian-American Records in 1962. Chad Allan and the Reflections then signed with Quality Records and released several flop singles in 1963/64, including one mis-credited to Bob Ashley & The Reflections. By 1965, the group was forced to change its name to Chad Allan & the Expressions after a U.S. group called The Reflections had scored a hit with "Just Like Romeo & Juliet".

It was at this point that the band scored their first hit, a 1965 rendition of Johnny Kidd & the Pirates' "Shakin' All Over". This track reached #1 in Canada, #22 in the U.S (where Quality had licensed the track to the American Scepter label for release in the U.S.) , and #27 in Australia. However, in an attempt to build a mystique around the record, Quality Records credited the single only to "Guess Who?" It was hoped that some listeners might assume the "Guess Who?" identity was deliberately masking several famous performers working under a pseudonym -- given the "beat group" nature of the record, perhaps even members of The Beatles and/or other popular British Invasion bands. In concealing the identity of the band in this fashion, Quality Records may have been influenced by a similar ploy made the previous year by "The You Know Who Group", an American outift whose Merseybeat-ish 1964 single "Roses Are Red My Love" had peaked at #43 in the US, and at #21 in Canada.

It is debatable as to whether anyone was really fooled by the "Guess Who?" ruse, or if the record would have been a hit regardless of the artist credit. But the upshot was that, even after Quality Records revealed the band was "really" Chad Allan & The Expressions, disc jockeys still announced the group as Guess Who?, effectively forcing the band to rename themselves. So although singles were issued as being by "Guess Who?", on their first two albums, the band was credited as both "Guess Who?" and "Chad Allan & The Expressions". Comes with splice and pad(s).