Hailing from Long Island, New York, Pellarin has written with artists including Teddy Swims, Kolby Cooper, Pecos & The Rooftops, Lydia Vaughan, David Ray Stevens, Michael Whitworth, Justin Ebach, YX, Brad Rempel, Sam Bergeson, Saliva, Attack Attack!, Roan Ash, Shane Stevens, Karley Scott Collins, Zack Dyer, Brandon Lancaster, Andrew Baylis, Filmore, Atlus and Savage Hands, among many others.