Iselin Løken Solheim, first known as Iselin Solheim and then simply as Iselin, is a Norwegian singer-songwriter. She is well known for her uncredited vocals on Alan Walker's singles "Faded" (2015) and "Sing Me to Sleep" (2016) and Gryffin's single "Just for a Moment" (2018).

Justin David Blau, better known by his stage name 3LAU, is an American DJ and electronic dance music producer. Raised in New York and Las Vegas, 3LAU left Washington University in St. Louis, where he studied finance. He has produced original tracks including "How You Love Me", "Is It Love", "Fire", "On My Mind", and "Hot Water", as well as remixes for Rihanna, Katy Perry, Shawn Mendes, and Ariana Grande and collaborations with gamer Ninja and HYO of Girls' Generation. 3LAU has also appeared at festivals such as Electric Zoo, EDC Vegas, Lollapalooza, and Life Is Beautiful, and tours extensively internationally.