DEF LEPPARD will make a return to the United States this June with a massive summer tour, dubbed "Rock Of Ages", which will include fellow rockers POISON and LITA FORD. A trailer for the trek can be seen below.In a recent interview with Ultimate Classic Rock, DEF LEPPARD guitarist Phil Collen stated about the upcoming tour, "We toured with [POISON] a couple of years ago and we've obviously known them since the '80s. When you're a band that's successful and there's other bands in your genre, at some point you're going to bump into them one time or another. So we've known those guys for years, they're great and we get on well with them. I actually just played guitar on Bret Michaels' solo record, I just did guitar solos and backing vocals and some rhythm guitars. I really admire Bret. I think he's fantastic and [I respect] how much energy he puts into it. A lot of people give him a hard time, but he works his ass off." DEF LEPPARD's influential career includes numerous hit singles and ground-breaking multi-platinum albums — including two of the best-selling albums of all time, "Pyromania" and "Hysteria". Most recently, the band released their first live album, "Mirror Ball: Live & More" last summer, which rose to the Top 20 on The Billboard 200 chart. The album captures the group's legendary concert experience, bringing together live versions of classic LEPPARD hits such as "Rock Of Ages", "Pour Some Sugar on Me" and "Foolin'". With 100 million records sold worldwide and two prestigious Diamond Awards to their credit, DEF LEPPARD — Joe Elliott (vocals), Vivian Campbell (guitar), Phil Collen (guitar), Rick "Sav" Savage (bass) and Rick Allen (drums) — continues to be one of the most important forces in rock music. Over the course of their career, the band has produced a series of classic groundbreaking albums that set the sound for generations of music fans and artists alike. The group's spectacular live shows, filled with powerful melodic rock anthems, have become synonymous with their name. For the past thirty years the band's concerts have become must-see events and have quickly made them an institution in the touring industry, as they continue to sell out arenas worldwide.