"I want to go out and play with him at least a couple of times," Perry tells Rolling Stone. "It's always fun to play something different. He might also play during our set. We're known for doing 'Mama Kin' together, but there are other songs he likes. 'Rocks' is one of his favorite records. I'm sure he's got a couple of songs he wants to play, and we'll oblige him. We're really good friends and it's going to be a really good tour."

Currently playing dates across Europe, Perry says the band is looking at changing up its setlist for the North American shows. "We try to hit something from every decade," he says. "We're going to do a few off-the-wall ones that there will be some discussion about. It's started to get very heavy on the 1970s, with a lot of album cuts.