While most of the great 'Glastonbury moments' happen on the festival's stages, just occasionally, something magical is captured behind the scenes. And, when a young Amy Winehouse was invited to perform backstage by the BBC in 2004, she did indeed do something a bit special.
Steeped, as she was, in the jazz tradition, Winehouse often reinterpreted other artists’ music. Her cover of The Zutons’ Valerie - a collaboration with Mark Ronson - has arguably become the definitive version of the song, while Tears Dry On Their Own, from 2006 album Back to Black, lifts the musical backing from Marvin Gaye and Tammi Terrell’s recording of Ain’t No Mountain High Enough pretty much wholesale.