Calvin's in a real jam.

SINGER/producer Calvin Harris is a big Jam fan - but we're talking the music, not the sweet stuff.

But that's the mistake that the powers that be in charge of fulfilling guest stars' riders made when Calvin requested the Jam in his dressing room at the V Festival at Weston Park, Staffordshire, last month.

Instead of his favourite tunes from Paul Weller, he was greeted with raspberry and marmalade. But we're sure Calvin would have seen the funny side - in more ways than one. As this summer he set up JAM TV on YouTube which features celebs opening jars of jam.

He was inspired to create it after comedienne Holly Walsh, a guest presenter on Pocket TV, upset him by filming him trying to open a jar of jam which she had glued shut. He described it as a terrible feature.