Shawn Mendes and Camila Cabello’s “I Know What You Did Last Summer” did not officially launch until the sixth day of the November 13-19
Despite that late arrival, it still managed a #17 debut on the weekly Digital Songs chart.
According to Nielsen Music, the debut position comes courtesy a US tracking week sales figure of 41,000. Since the song did not debut until November 18 (technically just prior to midnight on November 17), it reached that total in its first two days of availability.
Driven primarily by that sales figure, “IKWYDLS” starts at #97 on the all-encompassing Billboard Hot 100.