Out now via iTunes is Def Leppard's new acoustic medley of songs played live during the band's 2012 concerts. The seven-and-a-half-minute medley features portions of such Leppard favorites as "Where Does Love Go When It Dies," "Now," "When Love And Hate Collide," "Have You Ever Needed Someone So Bad," and "Two Steps Behind."

Frontman Joe Elliott told AOL's Noisecreep, "We decided to change the acoustic section of the set for the Rock Of Ages tour, and what we ended up with just grew into a really magical experience every night. We all enjoyed doing it so much and it was so well received by our audience, we decided to do a studio recording of it. I think it complements our main body of work very well."

Def Leppard kicks off its nine-date Las Vegas residency on March 22nd at The Joint at Hard Rock Hotel and Casino. The run, dubbed "Viva Hysteria!," will feature the band performing its 1987 classic Hysteria album in its entirety.

The upcoming Vegas stand isn't the first time that Def Leppard has revisited Hysteria. Back in 2006, the band released a two-CD package featuring the remastered original album, along with a series of live cuts, single B-sides, and rarities. Guitarist Phil Collen says that it was blast going back in time for the project: "It's actually great. I mean, normally, you'd, you'd think kind of re-hashing something from the past is kind of not very exciting, but it was something that all of us were, were very proud of, and, like, a, a real big achievement, if you like, and it's, it's not often you feel that. And I actually think it's really cool, and it was great going over all the old photographs, and, I'm actually really pleased and quite excited about it. It's actually a. . . yeah, it's a milestone thing."