The tunes you won't have been able to escape during the last 12 months...

Who'd have thought it? If you'd predicted at the beginning of last year that the two biggest songs on the planet would have been performed by a 2007 Canadian Idol reject and a slightly overweight South Korean rapper riding an invisible horse then we'd have laughed in your face. But, that's where we are at the end of a remarkable 2012 for pop music, and one that has seen the hitmaking power of radio and TV further eroded and replaced by the ever-increasing viral power of the internet.

So, what have been the world's biggest songs last year? Click on for 11 2012 tracks that have become truly global phenomena.