A lot goes on backstage in the world of pop music. Bands always put on a united front for their fans, but sometimes it's too hard to hide the spats and arguments going on behind the scenes.
Sometimes, it bubbles to the surface and is splattered all over Twitter - such as the current implosion in nineties r&b girlband En Vogue - with one member calling two bandmates 'arrogant b**ches' as she sues her 'evil' ex co-stars.
More often than not, if bands find they have 'creative' differences, they'll break up. However sometimes they keep going, still making music, but with all the tension and bad blood bubbling just beneath the surface.
So, in honour of all the grumpy rock stars, we've put together a gallery of the bands that hate each other the most. Don't blame us if you come out the other side with a deep rooted sense of contempt...