Kim Bendix Petersen (born 14 June 1956), better known by his stage name King Diamond, is a Danish rock musician. As a vocalist, he is known for his powerful and wide-ranging countertenor singing voice, in particular his far-reaching falsetto screams. He is the lead vocalist and lyricist for both Mercyful Fate and the eponymous King Diamond. He also plays keyboards and guitars on studio recordings but uses live shows to focus solely on his vocal performance. Diamond is renowned for his dark lyrical content and his story concepts.
https://en.wikipedia.org/wiki/King_Diamond