Mendes became an overnight star in August 2013 after posting a Vine of him singing a Justin Bieber song.\r<br>\r<br>What does an average day look like for Stitches singer Shawn Mendes? He let Nightline tag along for a behind the scenes, backstage look. SUBSCRIBE to ABC .\r<br>\r<br>What does an average day look like for Stitches singer Shawn Mendes? He let Nightline tag along for a behind the scenes, backstage look. SUBSCRIBE to ABC .\r<br>\r<br>Shawn Mendes opens up to host, Jason Ikeler about touring with Taylor Swift, his debut album, the strangest place hes ever written a song and more! Follow .
