Former Voice winners Cassadee Pope, Chloe Kohanski, Chris Blue and Jordan Smith return to help Coaches Kelly Clarkson, Alicia Keys, Adam Levine and Blake Shelton get their teams ready for the knockout rounds.

Relive the best moments from the blind auditions, battles and knockouts; get new insights into the coaches' strategies and never-before-seen footage of the coaches and past Voice champions; watch coaches perform vintage tunes from the Rat Pack era.