Def Leppard is one of the quintessential rock bands of the '80s. With such hits as "Foolin'," "Hysteria," and the ever-popular "Pour Some Sugar On Me" and countless others.

Despite the numerous tragedies that have befallen the band, including the death of guitarist Steve Clark and a car wreck that took the arm of drummer Rick Allen --who still drums for them today -- the band has kept it going for over 35 years.

The band will be coming to the Cynthia Woods Mitchell Pavilion this Saturday at 7 pm along with Lita Ford and Poison on the "Rock Of Ages" tour.

Here are some of the best demos, rare songs, and deep tracks the band has done over the past years.

10. "Pour Some Sugar On Me" (Demo) Though the famous guitar opening is still intact, the lyrics and other defining aspects of this classic took some time to evolve.

9. "Let It Go" One of the coolest things about this track is that it sounds exactly like some of their peers - more specifically AC/DC. In fact, many of the band's albums starting with 1981's High 'n' Dry were produced by AC/DC's famed producer and ex-Mr. Shania Twain, Robert "Mutt" Lang.

8. "Gravity" In the '90s, Def Leppard abandoned their signature sound and tried to adapt to the changing musical climate, which consisted mainly of pop artists like Britney Spears, Moby, and more. In hindsight, this is not bad, because it still carries the overall sound of the band, but with a more slick production.