Pink doesn’t sing songs. She mauls them, gobbling the microphone like a hyena that hasn’t eaten in a week. At her best, she is pop’s most galvanizing tough broad, but her sixth LP devolves into self parody. Co-written with studio aces like Max Martin and Greg Kurstin, it delivers power-chord packed electro-pop, and the lyrics cover the usual subjects: self-reliance, sex, rebellion. It’s supercatchy, but Pink strains to shock, peppering songs with gratuitous curse words. Best is “Just Give Me a Reason,” a ballad co-written with fun. frontman Nate Ruess, in which Pink dials back the drama, letting the melody and sentiments do their work, and singing, for once, instead of yowling.