Blake Shelton & Gwen Stefani in a ‘Lip Sync’ Battle on The Tonight Show with Jimmy Fallon [VIDEO]

Blake Shelton has a new album coming out, 'Bringing Back the Sunshine' hits stores on September 30th, and the new season of 'The Voice' begins on Monday, September 22nd on NBC...so 'The Tonight Show with Jimmy Fallon' had a lip-sync contest with Blake Shelton & Gwen Stefani...it's a must watch!