Similar to their rendition at the MTV VMAs back in August, Cabello began the performance by crooning a few a capella notes before joining her beau towards the end of the stage. From there, the singers teased the audience by getting just close enough to sneak in a kiss before pulling away to dance along to the Latin-inspired single.
READ MOREHere Are All the Winners From the 2019 American Music Awards
Their close friend Taylor Swift, who recently tapped Mendes for her "Lover" remix, was spotted in the crowd happily cheering on. Last month, Mendes broke the record for the most No. 1s among solo males in Billboard's Adult Pop Songs radio airplay chart's history, all thanks to "Senorita."
Keep updated with all winners from this year's AMAs right here.