How I Wrote That Song: Shawn Mendes & Camila Cabello "I Know What You Did Last Summer"

CLIP01/04/16
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Shawn Mendes and Camila Cabello share how the idea for "I Know What You Did Last Summer" came to them at a Taylor Swift concert, and how they improvised parts of the song in the studio.

Appearing:
Tags: The Tonight Show, Jimmy Fallon, How I Wrote That Song, Shawn Mendes, Camila Cabello, "I Know What You Did Last Summer"
S3 E603 minWeb ExclusiveTalk and InterviewLatenight