If you don't know Chris Keller or his stage name Douglas Warren, you don't get out in Nashville much. As a vocal coach, Chris has used his music theory degree to coach Taylor Swift and Hayley Williams. As a performer, he's been lead vocalist for bands across the Midwest, New York City and Nashville. His latest EP, Every Little Bit, available online everywhere, which features Mark Caldwell and Mark Poiesz -- you know them as country star Tyler Farr's bass player and drummer. In 2016, popular liquor brand Fireball started sponsoring Chris. Probably because the Douglas Warren band caught fire. Check him out on Spotify and book him before you can't. Book him.