The Voice 2013: Usher Reveals His Season 4 Coaching Strategy Tweet February 14, 2013 at 11:29AM EST by Wetpaint Entertainment Staff Related: The Voice, Blind Auditions , Usher , Season 4 , The Voice 2013 Credit: NBC Want to know the secrets of mentoring from the star who trained Justin Bieber? Just watch this backstage interview with The Voice Season 4 coach Usher! The Voice Season 4 airs Monday, March 25, 2013 at 8 p.m. ET on NBC.
