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. He is also known for his distinctive shock stage persona. He has been an influence for other rock and metal artists, including Metallica, Slayer and Cradle of Filth
