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Watch Shawn Mendes And Camila Cabello Perform ‘I Know What You Did Last Summer’ On Tonight Show

IKWYDLS

Are they/aren’t they young couple Shawn Mendes and Camila Cabello made their duet debut this week on The Tonight Show Starring Jimmy Fallon.

The Canadian solo singer and Fifth Harmony member performed their killer pop track I Know What You Did Last Summer with a little help from house band The Roots.

Written backstage during Taylor Swift’s 1989 Tour, which featured Mendes as the opening act, I Know What You Did Last Summer acts as the lead single from Shawn’s album Handwritten Revisited, which was released in November.

The duo performed IKWYDLS on New Year’s Eve as part of Pitbull’s New Year’s Revolution in Miami, with the two posting pool and beach pics the following day. Le jealous.

Watch The Tonight Show Starring Jimmy Fallon Monday to Friday at 11:30E on CTV Two and catch repeats weekdays at 4E/1P on Much.