Quo is the seventh studio album by Status Quo from 1974. Featuring Francis Rossi, Richard Parfitt, Alan Lancaster and John Coghlan. Like the previous album Hello!, it consisted entirely of songs written or co-written by the group. The only guest musicians featured were Bob Young and Tom Parker, who played harmonica and piano respectively on "Break the Rules". 　　Despite the band believing the album's opening track, "Backwater", was the most suitable candidate for release as a single, the only track to actually be released as a single was "Break the Rules", in April 1974, and it peaked in the UK at #8.