"You Ain't Seen Nothing Yet" is a rock song written by Randy Bachman and performed by Bachman–Turner Overdrive (BTO) on 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 #1 position on the Billboard Hot 100 singles chart and the CanadianRPM chart the week of November 9, 1974 as well as reaching #2 on the UK Singles Chart.