"You Ain't Seen Nothing Yet" is a rock song written by Randy Bachman and first performed by Bachman–Turner Overdrive (BTO) for the album Not Fragile (1974). It was released as a single in 1974 with an instrumental track "Free Wheelin'" as the B-side. It reached the number one position on the Billboard Hot 100 singles chart and the Canadian RPM chart the week of November 9, 1974, as well as earning the band their only major hit single in the United Kingdom, peaking at #2 on the UK Singles Chart, although the follow-up single, "Roll on Down the Highway", was also a minor UK hit.