Shawn Mendes might have come from Vine, but the Internet-bred heartthrob has made a pretty smooth transition into IRL super stardom. He's the youngest person since Justin Bieber to top the Billboard 200 and is currently out and about promoting his latest single, "Stitches." Mendes even performed it on Conan, not bad for a guy who can't even vote yet.
Steinfeld takes the lead on his somber, intimate duet. Mendes comes in later, near the pre-chorus, and the pair carry the tune to a new, emotive place. Watch it above, then check out our list of Shawn's 7 most iconic Vines.