‘The Voice’ Coach Shakeup: Christina Aguilera + Cee Lo Out, Shakira + Usher In
Entertainment Weekly reports that the new lineup is part of an effort by NBC to develop an arsenal of artist coaches that they can pick and choose from at various times, since it's difficult to arrange all of the original coaches' tour schedules and recording sessions with one another in order to film.
“Having award-winning artists as coaches means they need to be able to tour,” executive producer Mark Burnett said. “Whether in the red chair or on tour, our coaches have their chairs for life. This is exactly why, after three seasons, we needed to allow them to rotate out so they can get on the road amongst their fans. Meanwhile, we’re incredibly excited to have singular artists like Usher and Shakira joining the fold.”