The blind auditions for the 'The Voice' season 4 already started. Latin Singer Shakira will take Christina' Aguilera's place. Apparently Shakira and Blake are having trouble understanding each other! While fellow 'The Voice' judge and mentor Adam Levine was on the Ellen DeGeneres show, he revealed that Blake and Shakira don't understand each other. At least Blake can understand Usher, who is Cee Lo Green's replacement for season 4.