Graham Bonnet (born 23 December 1947) is an English rock singer and songwriter. He has recorded and performed as a solo artist and as a member of several hard rock and heavy metal bands including Rainbow, the Michael Schenker Group, Alcatrazz, and Impellitteri. Sometimes titled 'the most powerful voice in rock' by his fans, Bonnet is known for his powerful voice and wide vocal range. His singing has been noted as 'very loud' by both his contemporaries and himself, and he claims to be a self-taught singer with 'no discipline for lessons'.