Taylor Swift writes singles for the music video treatments and stadium tours now; when a new one lands ahead of the inevitable visual component, it can feel like you’re not experiencing the music in its final form. My first thoughts upon hearing “You Need to Calm Down” Friday were about which dozen celebrity guests would cameo in the clip for a song about haters dialing it down. The internet’s stressing everyone out. Pop stars and rappers seem especially tired of the heat of the spotlight,