Garry Peterson, Canadian-American drummer
The Guess Who are a Canadian rock band from Winnipeg, Manitoba, best known for their blues rock and psychedelic rock hits from 1968 to 1975.

The band originated in 1962 and achieved an international hit single with a cover of "Shakin' All Over" in 1965 under the name Chad Allan and the Expressions. After changing their name to the Guess Who, they found their greatest success in the late 60s and early 70s, under the leadership of singer/keyboardist Burton Cummings and guitarist Randy Bachman, with hit songs including "American Woman", "These Eyes", "No Time" and many others.

During their most successful period, the Guess Who released eleven studio albums, all of which reached the charts in Canada and the United States. They may be best known for their 1970 album American Woman, which reached no. 1 in Canada and no. 9 in the United States, while five other albums reached the top ten in Canada. The Guess Who charted fourteen Top 40 singles in the United States and more than thirty in Canada.The Guess Who was disbanded by Cummings in 1975, though bassist Jim Kale and/or drummer Garry Peterson have toured and recorded under the Guess Who name since 1977, frequently with no other original band members involved.