Who Do You Think Is A Better Voice Judge? Christina Aguilera Or Gwen Stefani?

Tension is reportedly brewing on the set of The Voice. Judge Christina Aguilera and her co-judge Blake Shelton have become enemies because she feels he has stabbed her in the back. Apparently Blake is doing everything in his power to keep girlfriend Gwen Stefani on as a judge and in turn, trying to get Christina booted off the show. 

I don't necessarily have an opinion either way but in all fairness, Christina has been there longer and who knows how long Blake Shelton and Gwen Stefani's relationship is going to last? What if this backfire's on him? The drama! What do you think about this situation and who do you feel is the better judge anyway?