Since learning to play guitar at the age of 13 in 2012, Mendes has redefined the mainstream appeal of modern teenage songwriting. The Ontario native’s albums -- 2015’s Handwritten and last year’s Illuminate -- both hit No. 1 on the Billboard 200, while current smash “There’s Nothing Holdin’ Me Back” -- his fifth top 20 hit on the Billboard Hot 100 -- echoed throughout arenas on his sold-out summer tour, which has earned more than $32 million, per Billboard Boxscore. "I can't believe how fast things have happened," Mendes tells Billboard, "and I'm just so honored that people are able to look to me as a leader." Read the full Shawn Mendes Q&A here.