Popular boyband JLS have unveiled official footage of themselves before they hit the big time rehearsing a self-penned track. 

To tease the release of their live DVD and concert film 'Eyes Wide Open', which is now widely available to purchase, the lads have treated fans to a clip that shows them sat in a private practice session where they run through a song called 'Shy Of The Cool'. 

The film itself was recorded earlier this year while JLS were on tour and became one of the most popular music cinema events of the summer. Watch the clip, which appears on the 'Eyes Wide Open' DVD as an extra, below: