Question: Which American heavy metal singer, nicknamed "Ripper" from the Judas Priest song, "The Ripper", performs alongside guitarist Yngwie Malmsteen on his 18th studio album, "Relentless"?
Sentence (from "Relentless (Yngwie Malmsteen album)"): Relentless is the eighteenth studio album by guitarist Yngwie Malmsteen, released on November 23, 2010, through his independent label Rising Force Records.
Relevant evidence: Yes