Teenage dream

It’s Katy Perry! In 3D! And you’re almost certainly not going to see it! But for most of those who are, this is probably as good as cinema is going to get this year, or perhaps ever. Indeed, this documentary about Ms Perry’s rise to pop hyper-stardom is — to steal the title of her third studio album — a teenage dream. For many teenage girls (and younger), this is a chance to see their heroine’s life in exacting high definition. For many teenage boys (and older), it will be something else entirely. And in 3D too!

But first some background information for those who are unfamiliar with Katy Perry and her work. The basic points are: she’s 27; she’s discovered a niche in the music industry as a kind of sexy cartoon character, all eyelashes, cleavage and wacky costumes; and she’s outselling almost every other singer in town, notably becoming the first female artist to have five songs from the same album go to No.1