A film like The Sapphires works in much the same way as a pop song. People will presume that it’s all very easy to just chuck some chintzy, bright colours and some catchy hooks around its attractive stars and the entire enterprise will sell itself. Sadly, people’s idea of pop music is largely just as misinformed as it is on popcorn movies. There’s a delicate routine of tightropes and juggling that goes in to perfecting a crowd-pleasing, mainstream-baiting slice of multiplex fare. The debut feature of director Wayne Blair and Tony Briggs, adapting his own stage show alongside Keith Thompson, will likely be criticised by many for being as attractively empty as a Katy Perry song, but the skill and sly moments of real panache help turn The Sapphires into a shining example of the type of film this country really ought to be making more of.