Blake Shelton Shares Gwen Stefani's Reaction to Him Wanting Her to Propose (Exclusive)

ET spoke with Shelton backstage at 'The Voice,' where he sounded off on his relationship, the Kentucky Derby, Prince Harry and Meghan Markle's baby, the Met Gala, and, of course, the competition. 'The Voice' airs Mondays and Tuesdays on NBC.