Season five of "The Voice" may have ended Tuesday night, but viewers won't have to wait all that long for season six. NBC announced Tuesday that the next edition of the musical competition will begin with a special two-night premiere on Feb. 24 and 25 at 8 p.m. both nights. As previously announced, Shakira and Usher, right, who appeared on season four, will be returning as coaches, sitting alongside Adam Levine and Blake Shelton, who have been judges since the show's first season.