"Build Me Up Buttercup" is a song written by Mike d'Abo and Tony Macaulay, and released by The Foundations in 1968 with Colin Young singing lead vocals. Young had replaced Clem Curtis during 1968 and this was the first Foundations hit on which he sang.It hit #1 on the Cash Box singles chart and #3 on the US Billboard Hot 100 in early 1969. It was also a #2 hit in the United Kingdom.