Watch: Shawn Mendes' 2016 AMAs medley.

Watch: Shawn Mendes' 2016 AMAs medley.

With his friends Fifth Harmony bopping along from the audience, Shawn Mendes performed a medley of his latest singles, 'Mercy' and 'Treat You Better', live at the 2016 American Music Awards today.

Watch some of the performance below...

P.S. This is adorable:

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COUP DE MAIN’S TRUE JAMS PLAYLIST

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