Snoop Dogg joins coaches Blake Shelton, Kelly Clarkson, John Legend and Nick Jonas to mentor the remaining artists who have made it through the Battle Rounds, as each team prepares for the Knockouts, beginning Monday, April 19. In the Knockout Rounds, each coach pairs up two artists from their team to perform against each other. But unlike the Battle Rounds, in which the paired artists perform the same song in a duet, in the Knockout Rounds, the artists each perform a song individually selected for them. Then, each coach picks the winner who will advance to the next round of competition. The Voice coaches and their artists have already had the opportunity to work with music industry powerhouses as advisors this season as they were joined by Luis Fonsi (Team Kelly), Dan + Shay (Team Blake), Brandy (Team Legend) and Darren Criss (Team Nick), who helped prepare the artists as they got ready to go head-to-head in the Battle Rounds. Snoop Dogg has released 19 studio albums, sold over 40 million albums worldwide, reached No. 1 countless times on Billboard charts internationally and received 20 Grammy nominations. The Voice airs Monday nights at 8 p.m. ET/PT on NBC. Next, how The Voice coaches are ganging up on Blake Shelton this season.