All through her career, it has been impossible to divorce Madonna's music from her image, as they feed off each other to the point where it's hard to tell which came first, the concept or the songs. Glancing at the aggressively ugly cover to Hard Candy – its blistering pinks and assaultive leather suggesting cheap bottom-barrel porno – it's hard not to wish that this is the one time Madge broke from tradition, offering music that wasn't quite as garish as her graphics…