WATCH: Shawn Mendes & Camila Cabello Know 'What You Did Last Summer'!

After weeks of teasing their collaboration, Shawn Mendes & Fifth Harmony’s Camila Cabello have dropped their song ‘I Know What You Did Last Summer’.

Now, don’t mistaken the song title for this 1997 movie starring Jennifer Love Hewitt and Sarah Michelle Gellar,

No, this is Shawn Mendes’ new single that will appear on re-release of his album Handwritten. The two wrote this song backstage at one of Taylor Swift’s ‘1989 World Tour’ stops (a tour which Shawn opened).

Check out the video for ‘I Know What You Did Last Summer’ below!