Mendes ' first televised performance of " Treat You Better " happened at the 2016 Much Music Video Awards on June 19 . On July 12 , 2016 , he performed the song on '' The Tonight Show '' , and again on October 8 , 2018 with Jimmy Fallon and his house band The Roots as backing using " classroom instruments " . On November 20 , 2016 , Mendes performed " Treat You Better " at the 2016 American Music Awards
2016 Much Music Video Awards
2016 iHeartRadio Much Music Video Awards
Treat You Better