"'Rock and Roll' has just got that cheeky energy about it," Jimmy Page told Rolling Stone. "It's a party. 'It's been a long time since I rock and rolled.' It says it all, really. It's great lyrics and it's a great performance."

"As a song, it was actually kind of punky; pre-punk," added bassist/keyboardist John Paul Jones. "It was really fast too, onstage anyway. It just got really quick, a lot of energy. It's a lot of fun to play. The crowd loved it. We loved it."

Released in November 1971, the album - which is officially untitled - defined the sound of rock music for a generation with ubiquitous anthems such as "Stairway To Heaven", "Rock And Roll", "Black Dog" and "When The Levee Breaks". The album was inducted into the Grammy Hall Of Fame in 1999, has been certified 23x platinum by the RIAA.

The "Led Zeppelin IV" deluxe edition includes unreleased versions of every song heard on the original album including alternate mixes of "Misty Mountain Hop" and "Four Sticks", mixes of "The Battle Of Evermore" and "Going To California" heavy with guitar and mandolin, and the fabled, alternate version "Stairway To Heaven", mixed at the Sunset Sound Studio in Los Angeles which lets fans hear one of the most revered songs of all time as they have never heard it before.