On Monday, Led Zeppelin will finally release their 2007 reunion concert on CD, vinyl, DVD and Blu-ray. Celebration Day captures that December 10th, 2007 show at London's O2 Arena for which more than 20-million people tried to buy tickets. Billed as a tribute to the late Ahmet Ertegun, founder of Atlantic Records, there was talk that it would also include The Rolling Stones and Cream, but in the end it was just Zeppelin, with a short opening set from Foreigner.

Looking back on that night, Jimmy Page says, "We all played our hearts out." Robert Plant adds, "That night, we were just hanging on for dear life...and really enjoying it and taking beyond what we thought we were about."

With Jason Bonham on drums in place of his late father John Bonham, and of course John Paul Jones on bass, it was Zeppelin's first public performance since 1988 and their induction into the Rock and Roll Hall of Fame in 1995.