For pop star Tove Lo, Sweden’s gritty party queen, pop is personal. On her new album Blue Lips, the casually cool 30-year-old singer-songwriter continues to find poetry in frank desire. Conversant in feminism, sex-positive and drug-friendly, the 30-year-old producer has been a force in pop since the early ’10s, when she worked with hitmaker Max Martin and wrote songs for the likes of Icona Pop and Ellie Goulding.