Pharrell as a Lego and Robbie Williams as a chimp? Here's how music biopics get creative

Many of the expected conventions of euphony biopics are contiguous successful "Piece by Piece," astir the producer-turned-pop prima Pharrell Williams, and "Better Man," astir the British vocalist Robbie Williams. There's the young artist's impulse to interruption through, fallow originative periods and regrettable chapters of fame-addled excess.