In a never before seen backstage video, Shelton and his best bud - fellow Voice Coach Adam Levine - were sighted backstage bickering. America's favorite bromance went back and forth exchanging insults, staring into one another's eyes while they tell each other everything they hate about them.
"I think you have maybe the worst team," said Levine to Shelton.
"I think you have the worst attitude!" fired back the country singer.
The two went back in forth insulting everything from each other's breath to their faces, before Levine won the war of words by telling Shelton he had the "worst outfit."
Their unlikely friendship was born back in 2010 when they were cast as two of the original four coaches on Season One of the singing series. Twelve seasons and countless contestants later, and the two singers argue like and old married couple.
You can watch them hilariously bicker below!
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