Reading this on mobile? Click here to view This year we've seen Rita Ora top the charts with RIP, Kelly Clarkson get all Nietzschean on Stronger (What Doesn't Kill You) and Lady Gaga (no snuff stranger: she's simulated suicide onstage before) debut a song entitled Princess Die. No prizes for guessing the doe-eyed protagonist in this instance. Squeaky-clean Leona Lewis has covered Trent Reznor's ha