Shawn Mendes and Camila Cabello are best-selling singers. Mendes released his chart-topping debut album, Handwritten, in April 2015. Likewise, Fifth Harmony, the girl group Cabello is a member of, released its debut album, Reflection, in January 2015; it reached No. 5 on the Billboard 200 albums chart. Mendes and Cabello recently teamed up for the single "I Know What You Did Last Summer."