I Know What You Did Last Summer

Where they were

Released on January 1, 2015, 'I Know What You Did Last Summer' marked Shawn Mendes' first collaboration with fellow artist Camila Cabello. At this point in his career, Mendes was transitioning from a viral sensation to a recognized pop musician, following the success of his debut EP 'The Shawn Mendes EP' just months prior in 2014.

Why it matters

This song became a commercial success, peaking at number 20 on the Billboard Hot 100 and earning Mendes and Cabello significant attention for their chemistry and vocal prowess. The track also showcased Mendes' ability to blend folk-pop influences with mainstream appeal, contributing to the rise of collaborative duets in pop music during that era.

Essential tracks

• "I Know What You Did Last Summer" — The title track exemplifies Mendes' signature sound while exploring themes of nostalgia and regret, making it a relatable anthem for young listeners.