Targeting its demographic with pinpoint accuracy, Hannah Montana & Miley Cyrus: Best Of Both Worlds Concert hardly stretches the parameters of the concert film. Nor does it give any compelling reasons why Cyrus and her alter-ego have proved such a phenomenal success across the pond, beyond revealing her to be a fresh-faced presence with a voice perfectly suited to her anodyne material. The result is little more than a Disney cash-cow entirely wasted on anyone old enough to smoke, drink or vote.

The irony of a US TV programme about a fictional pop star spawning a real-life one is largely lost on the makers of this 3-D offering, which rarely allows itself the luxury of contemplation as it films its schizophrenic heroine in her on-stage element. Thus we see Hannah (Cyrus in blonde tresses) trot out a selection of her aggravatingly upbeat hits before handing the mike over to, er, herself (Cyrus minus syrup) for more of the same. In between we get Jonas Brothers, three mop-topped tykes who bound around in ripped jeans before singing a song by Busted.

"MARKETING OPPORTUNITY MADE FLESH"

Snippets of Smiley Miley's backstage life make it abundantly clear she's just an ordinary girl unaffected by her global fame. To ram home the point, we even get a mawkish duet with her country singer dad Billy Ray - yes, the 'Achy Breaky Heart' guy - extolling the virtues of her dear departed grandpa. Unfortunately, it takes more than 3-D photograply to make this prefab creation anything more than a marketing opportunity made flesh.

Hannah Montana & Miley Cyrus: Best Of Both Worlds Concert is out in the UK on 14th March 2008.