Why Gwen Stefani Called Blake Shelton a Jerk on ‘The Voice’

Gwen Stefani calls Blake Shelton a jerk while battling it out on 'The Voice.' During the blind auditions, 19-year-old Austin Montgomery earned three chair turns from Gwen, Blake and the newest coach, Camila Cabello, while singing a country classic by Hank Williams. Blake pulled out all the stops to encourage Austin to pick him as his coach, but in a turn of events, so did Gwen. 'The Voice' airs Mondays and Tuesdays at 8 p.m. ET/PT on NBC.