BATTLE OF THE BANDS AND SINGERS

Adam Levine v Christina Aguilera

These two judges on The Voice are constantly competing against each other, and famously had a rumoured blow-up behind the scenes on set earlier this year. Adam told his protoge candidate, Tony Lucca, to sing Jay Z's '99 Problems', as a subtle dig to Lucca's former Mickey Mouse club member and vicious judge, Christina. And when Christina found out, well, you can bet more than one voice was raised!

Photo by Getty Images Oct 26, 2012

BATTLE OF THE BANDS AND SINGERS

These musicians can't stand the sight of each other, and have let rip with some pretty harsh words of what they really think of each other! Click through to check out the cruelest insults and hottest zingers!

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