After "A Whiter Shade of Pale" became a hit, the band set out to consolidate its studio success by touring, with new official drummer Bobby Harrison added to the line-up; its live debut was opening for Jimi Hendrix in 1967. The group's follow-up single, "Homburg", with a line-up change of former Paramounts B. J. Wilson on drums and Robin Trower on guitar (replacing Harrison and Royer, respectively, who exited to form the band Freedom), reached No. 6 in the UK, No. 15 in Canada, and No. 34 in the US.