Influenced by acts as wide-ranging as Gary Numan, Blondie, Talking Heads, No Doubt, Nancy Sinatra and MIDORI, hard rock singer Poppy has famously collaborated with Bad Omens on “V.A.N.” and Knocked Loose on “Suffocate," acts she considers friends. For her new album, Negative Spaces, she returns to her heavy metal roots. She performs tonight at 7 at House of Blues.