Related Information for Ian Gillan Ian Gillan (born on 19 August 1945), is a rock music vocalist best known as the lead singer for legendary rock band Deep Purple. He is considered to be one of the foremost rock vocalists, who introduced into the rock music the vocal belting technique. In his prime he possessed a very wide vocal range which was rumored to be 4 and a half to 5 octaves and with seemingly effortless and fluid movement throughout it and with remarkable force and precision in the upper register.Gillan was born.. read more