Hit Songwriter Julia Michaels on Finding Her Own Voice With 'Issues'

Julia Michaels, who has co-written hits for Justin Bieber, Selena Gomez and Hailee Steinfeld, talks stepping out on her own with 'Nervous System.'Catie LaffoonOn a Los Angeles morning, as the temperature climbs toward the triple digits, Julia Michaels rolls up for breakfast at a spot on Ventura Boulevard not far from her home, wearing a black turtleneck, floral-printed pants and one of the 16 pairs of Doc Martens she owns. "I never know how to dress for the right temperature," she explains. At t