Life is Beautiful festival returns to Downtown Las Vegas September 22-24. The 2017 edition is headlined by Gorillaz, Chance the Rapper, Muse, Blink-182, and Lorde. The bill also includes The xx, MGMT, Haim, Vince Staples, Schoolboy Q, Pusha T, AFI and No Doubt supergroup DREAMCAR, Cirque Du Solei, I…