Shakira, Usher bring edge to ‘The Voice’

Season four of “The Voice,” featuring Usher and Shakira filling in for Cee Lo Green and Christina Aguilera, taped blind auditions recently, and Rolling Stone had a chance to watch the new judges in action. What we saw in our brief glimpse into the new season was that there will be no messing around. All four judges, including returnees Adam Levine and Blake Shelton, mean business.