Popsugar Entertainment Award Season Justin Bieber and Shawn Mendes's Performance at 2020 AMAs Justin Bieber and Shawn Mendes Get Emotional in Debut Performance of "Monster" 23 November 2020 by Yerin Kim View On One Page Photo 1 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Previous Next Start Slideshow Award SeasonShawn MendesAmerican Music AwardsJustin BieberMusicTV