The Voice season 11 witnessed country singer Sundance Head taking away the winner title. Being on Blake Shelton's team, it's definitely a proud win for the coach as well.

But not everyone was content with the results. According to Radar Online, Adam Levine accused Blake Shelton that the finale was rigged.

"Adam said that Blake had totally rigged it, and Blake told Adam that he was just a sore loser after the show wrapped," an insider revealed. "Adam does not like losing - especially to Blake."

The insider further added that both Adam and Blake are very competitive in nature. And since the beginning of The Voice these two were in constant competition with each other when cameras aren't rolling.

There was much backstage animosity during the series, as source claimed. The fact that the last two contestants belonged to Adam and Blake's team fueled up the animosity.

Adam was so angry for losing that after the finale he did not even congratulate Blake. Blake was very offended by Adam's behavior and decided to take matter into own hands.

He rubbed his win in everyone's face. Blake kept telling everyone on the set, including Adam Levine, that it was his contestant that won the completion.

It seems like Adam Levine is having a really bad year on The Voice. Previously, Us Weekly also found out from a source that Miley and Adam have been totally butting heads on numerous occasions on set.

Both Miley and Adam have short attention spans and they find each other annoying. Before Adam Levine starts a brawl with any other another judge, is it better for him to leave the show.

Both Adam Levine and Blake Shelton are veterans in the show and have worked with "The Voice" since the beginning. It was previously reported that the two are planning to exit the show after Season 12.