Shawn Mendes is the only artist with three Number One singles (on the Billboard adult pop charts) before the age of 20. His songs “Stitches”, “Treat you Better”, and “There’s Nothing Holdin’ Me Back” all made it to number one on the chart before Shawn was even legally old enough to celebrate his number ones with an alcoholic drink. Shawn even helps write some of the music he sings, including one of his more recent singles “If I Can’t Have You.” Watch the video below.