"We broke it up into three different parts," Collen tells One On One With Mitch Lafon. "The initial one, we got the 12 songs, and pretty much, we played in the studio and we kind of played live and we got the essence of the songs down. That's something we don't normally do.

"And then we went back in May, just before the tour with KISS. And we went back a third time and just kind of finished stuff off in January. And yeah, it's just amazing. I'm thrilled with how it turned out."

Leppard expanded their approach to making the group's eleventh studio album, which originally began as an idea to record an EP's worth of material.

"We didn't really have anything to lose," Collen explains. "We didn't have a record company or management or anyone breathing down our necks. We got some ideas, and they all worked.

"Normally, we'd go in and we'd always find ten reasons why to not do an idea as opposed to just going with it. And this was the first time we've ever just sat around and every idea got a fair shot, you know. Everyone was, like, 'Oh, that's cool. Let's try that.'