Claim: Janis Joplin had, as her backing band, a rock band from Canada.
Evidence: After releasing two albums with the band , she left Big Brother to continue as a solo artist with her own backing groups , first the Kozmic Blues Band and then the Full Tilt Boogie Band.
Full Tilt Boogie Band was a Canadian rock band originally headed by guitarist John Till and then by Janis Joplin until her death in 1970.