Are you a Shawn Mendes fan [2]? If so, then you've probably listened to a few songs since "Stitches" topped the charts in 2016. Today, the Canadian superstar has released three studio albums with head-boppin' songs like "In My Blood" and "Lost in Japan" that have played on repeat on your local radio station. While it's no secret that Mendes's good looks [3] have us singing "have mercy on our hearts," just how big of a fan are you? Do you know your Mendes from your Ed Sheeran song lyrics? How about Taylor Swift [4]? Take this quiz and decipher whose lyrics are whose [5] ahead!