Unsung heroes whose work brings artists acclaim.
Emily Lazar, 43
The first female mastering engineer to be nominated for a record of the year Grammy (for Sia's "Chandelier" in 2015), Lazar, her astute ears and Greenwich Village studio The Lodge are in high-demand. Just ask clients Foo Fighters, Beck and Coldplay.
Julia Michaels, 22
With co-writes on four Hot 100 hits (for Justin Bieber, Selena Gomez, Hailee Steinfeld and Gwen Stefani), Michaels is on the rise. And she just spent studio time with Britney Spears.