If you need something to look forward to, 2015 Bonnaroo Music and Arts Festival is certainly it. Hosted at Great Stage Park in Manchester, Tennessee, this year the festival took an avant-garde approach to the lineup reveal, asking fans to dial 1-844-ROO-2015 from 6pm to 9pm yesterday to hear an operator reveal one artist. The fans were then instructed to post that name of the artist accompanied with the hashtag #Bonnaroo to their social media accounts which, in turn, unlocked the full lineup on the festival's website. Since this occurred yesterday, and the 2015 lineup has made its way across the web, we are saving you from that process if you just look below. The headlining artists are Billy Joel, Mumford & Sons, Deadmau5, and Kendrick Lamar, while Childish Gambino, G-Eazy, and Odesza also highlight the list. Bonnaroo 2015 runs June 11-14 and tickets go on sale January 17 at Noon EST.