Hilary Duff recently promised fans new music will arrive “in the blink of an eye” — and she wasn’t joking. The actress-singer has announced her new single “Mature,” out Nov. 6. “Mature” will be Duff’s first single in a decade, following “Sparks” from 2015’s Breathe In. Breathe Out. The single artwork features an image of Duff overlapped three times, with the title written in pink. After teasing on social media, Duff officially announced her return to music back in September , when she signed