LOU REED AND METALLICA Two giants of rock ’n’ roll team for a controversial collaboration Lou Reed is the first to admit that Lulu, his collaborative concept album with Metallica, is “not a normal recording by any stretch.” First there is the very idea of the pairing, which left many wondering where the legendary Velvet Underground founder and the iconic heavy metal band would find common ground. Then there’s the subject matter: Lulu is...