Led Zeppelin release new song Keys to the Highway
23 April 2014 Last updated at 08:01 BST
Legendary rock group Led Zeppelin have released two previously unheard recordings ahead of the reissue of the band's first three albums in June.
The two tracks are among dozens of tracks which the band will officially release alongside the reissues.
One is an early version of famous hit, Whole Lotta Love, while the other is blues classic Keys to the Highway, recorded in 1970 - heard here.