Question: Mayhem Festival 2015 included a Danish heavy metal musician who was the lead vocalist for what non-namesake band?
Sentence (from "Mayhem Festival 2010"): As in previous years, the Freestyle Motocross stunt team Metal Mulisha returned, in addition to comedian Jay Oakerson and a costume party/variety act "Beacher's Madhouse" featuring DJ's and the scantily-clad "Beacher's Babies".
Relevant evidence: No