Colin Young , Former lead singer of The Tonicks. He is mainly known as the singer of "Build Me Up Buttercup" for The Foundations. He replaced original lead singer Clem Curtis in 1968. He was also the lead singer of Mercy Mercy who had the 1980's hit, "It Must be Heaven" and " What Are We Gonna Do About It?". He has recently gone on the road with his own version of The Foundations.