Rock stars, world famous musicians - they're really not all that different to children in the playground. The only difference being that when an international artist starts slagging off another, we all get to hear about it.
The Black Keys famously, and quite rightly, referred to Nickelback as 'shit' in Janury this year, and have recently 'apologised' for their comments, saying "There's worse bands than Nickelback. Maybe." As apologies go, the band themselves admit, it's one of the worst ever.
Of course, feuding musicians is no new thing. From Biggie and Tupac to Madonna and Elton, check out some of the best music wars of all time.
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