Chris Robinson of The Black Crowes, Billy Idol, Alanis MorissettePhoto: (Getty Images)
Billie Joe Armstrong and Mike Dirnt of Green Day Photo: Getty Images
Ice CubePhoto: Getty Images
MacklemorePhoto: Getty Images
Matthew Followill, Jared Followill and Caleb Followill of Kings of Leon Photo: Getty Images
(L-R) Brian Kelley and Tyler Hubbard of Florida Georgia Line Photo: Getty Images
The Weeknd Photo: Getty Images