Brady Corbet's "Vox Lux" is an unusual film. It starts off with one of the tensest high school shootings I've ever seen and ends with an elaborately conceived and hypnotic pop music performance, filled with tacky dancing and a light show. In between all the drama and fireworks is a character study about fame, trauma and the undeniable power of song. Does it all come together? Not really, but it's incredibly fascinating to watch an artist go for broke like Corbet does here.