Shawn Peter Raul Mendes is a Canadian singer-songwriter. He gained a following in 2013, when he posted song covers on the video sharing platform Vine. The following year, he caught the attention of artist manager Andrew Gertler and Island Records A&R Ziggy Chareton, which led to him signing a deal with the record label. Mendes' self-titled debut EP was released in 2014, followed by his debut studio album Handwritten in 2015. Handwritten debuted atop the US Billboard 200, making Mendes one of five artists ever to debut at number one before the age of 18. The single "Stitches" reached number one in the UK and the top 10 in the US and Canada.

Karla Camila Cabello Estrabao is an American singer and songwriter. She rose to prominence as a member of the pop girl group Fifth Harmony, which became one of the best-selling girl groups of all time. While in the group, Cabello began to establish herself as a solo artist with the release of her collaborative singles "I Know What You Did Last Summer" and "Bad Things" —the latter peaked at number four on the US Billboard Hot 100. She left Fifth Harmony in late 2016.