Every musician, from young newcomers just starting out to seasoned, arena-touring veterans, had a mentor -- a person who, in one way or another, initially inspired them to plug in their guitar or step up to the mic.
Musical mentoring is a concept that serves as the foundation for reality TV competitions like The Voice (which kicks off its second season on Feb. 5), but not every artist had the luxury of hands-on coaching at the early phases of their careers. Some were mentored simply by the music coming out of their stereos.
We asked 22 artists -- including Common, Florence Welch, blink-182, Mary J Blige, 30 Seconds To Mars, T.I., Linkin Park, Mumford & Sons and more -- to name their chief musical mentors. Fittingly, the answers we got were as diverse as the musicians themselves. Watch the video and see who inspired the careers of your favorite stars.