Bottom Line is an album by British bluesman John Mayall, an English blues singer, guitarist, organist and songwriter, whose musical career spans over how many years?
Bottom Line (album): Bottom Line is an album by British bluesman John Mayall with various musicians. John Mayall: John Mayall, OBE (born 29 November 1933) is an English blues singer, guitarist, organist and songwriter, whose musical career spans over fifty years.
fifty