Gunn addressed his absence (he was supposed to perform Sunday with Sheryl Crow) in an Instagram post. "Well, let's just say I missed my opportunity to sing with legendary @sherylcrow," Gunn wrote. "What happened is not much to discuss at this point. It was last minute decision but I couldn't help but say no cause of some personal morals and values due to unpleasant environmental experiences. It's not necessary to state it, it is what it is, so I felt like I had to move on."