Dennis Liu created the viral sensation fan video/Mac advert for Bird and the Bee's Again and Again, then the interactive video for Kyle Andrews' Sushi composed of innumerable tiles of clickable YouTube screens.

But his latest flies in the face of the advance of tech. It's a videogame recreated in 'real life' - a bit like the ad for Google Chrome - for the redoubtable Sia. She's all sped up as she partakes in a real-life SingStar game, as Dennis's helpers feed the words on a hokey wooden track.

Uncomfortable teenagers also play find themselves as role-playing avatars, until humanity reasserts itself over the pixel world. A smashing idea for a lovely song, executed with a lot of heart. And sweat.