All bands have songs they don't release for various reasons but here's five more pieces of music that slipped through the cracks and have gained mythical status.

Black Gold - Jimi Hendrix

JUST months before Hendrix's death in 1970, the legendary guitarist recorded a suite of 16 songs about his life. The acoustic demos were then given to drummer Mitch Mitchell in August at the Isle of Wight Festival for Mitchell to learn, but a month later Hendrix was dead. The drummer forgot about the tape for decades but later rediscovered them and gave them to Hendrix's family. They have since become the ultimate lost masterpieces. Full band versions of a handful of the songs, notably Drifting and Stepping Stone, have appeared on other albums, but fans are still waiting for the Hendrix Estate to release the originals.

Cigarettes & Valentines - Green Day

GREEN Day were working on the follow-up to Warning when the master tapes were apparently stolen. Rather than try to recreate the album, the pop-punks started from scratch and came up with their mega-selling return-to-form American Idiot, leading frontman Billie Joe Armstrong to call the theft "a blessing in disguise". But the story has been called a bit suss in some quarters - a lack of leaked bootlegs have led some to suggest Green Day deleted the tapes because they weren't up to scratch or that they simply lost them.

Songs From The Black Hole - Weezer

WEEZER'S head-geek Rivers Cuomo proposed the band follow-up their self-titled debut with a bizarre space-rock opera set on board a futuristic spaceship. Part-way through recording, the band gave up on the concept album and made the awesome Pinkerton, the first four songs of which are from the planned ...Black Hole. Demos of some of the songs ended up on Cuomo's home recordings series Alone, while others have been leaked (both illegally and by the band) online. But Weezer's rabid fanbase is keen to hear the remaining songs and see some kind of official release.