Before Camila Cabello became friends with Swift, she was a huge fan of her music. In March 2015, the former Fifth Harmony singer shared a video of her singing at a concert that was apart of Swift's "1989" tour, and wrote a lengthy caption expressing her love for the "Shake It Off" singer, writing in part on Instagram, "tonight i sang at the top of my lungs to all the Taylor songs that have been the soundtrack to my life- that have understood how I felt more than anybody else did."
Months later, in July 2015, Swift and Selena Gomez threw Cabello a party to celebrate the "Señorita" singer's 18th birthday, as reported by MTV. From that point on, the two became close friends, with Cabello opening for Swift during her "Reputation" tour in 2018.
Touching on their friendship, Cabello revealed to Bustle in a 2021 interview, "Taylor has always been so kind and supportive and also goes out of her way to give you artist advice. [She's] really about making friendships and relationships the most important thing. She is so brave at watering those seeds of friendships and relationships."
While the two have been busy with their own musical projects, their friendship is going strong. In April 2022, Cabello took a brief moment to highlight Swift in an interview with Deezer. When asked who would write the soundtrack to her life, the "Havana" singer smiled and said, "Taylor Swift."