Coming up on the Sunset Strip in the early 80s, Ratt spawned a huge following worldwide with their swagger, style and straight-ahead hits.

Fast forward to nearly 30 years later, and the band are continuing where they left off at their inception with their brand new crushing album Infestation.

To commemorate this feat, Ratt -- Stephen Pearcy, Warren DeMartini, Carlos Cavazo, Robbie Crane and Bobby Blotzer -- have returned to the Sunset Strip, unleashing their one-of-a-kind Ratt N' Roll on The Key Club on April 20th, 2010.

We showed you some behind-the-scenes footage of the band getting ready to perform, talking about the new album, reminiscing about their early days, remembering their fallen brother Robbin Crosby and more, and now we've got the 5th and final installment in this series where we see the guys perform their classic cut "Way Cool Jr." and talk about how far they've come. Watch it below and if you haven't done so already, pick up your copy of Infestation RIGHT HERE.

Stay tuned to for more from Ratt as they prepare to return to the touring circuit following frontman Stephen Pearcy's routine surgery.