Brian Johnson and Joshua Davis perform "Knockin' on Heaven's Door" on "The Voice" US Season 8.
Brian Johnson and Joshua Davis from Team Blake perform "Knockin' on Heaven's Door" in the Battle Round of "The Voice" US Season 8.Screenshot from The Voice YouTube Video

"The Voice" US Season 8 is entering the Battle Round tonight after two weeks of Blind Auditions. A total of 43 contestants will take on each other in the next few weeks with the hope of progressing to the next round and potential spoilers have hinted what to expect in the show.

Interestingly, a performance of one of the Battle Rounds featuring Brian Johnson and Joshua Davis from Team Blake has been uploaded on YouTube. The duo takes on the song, "Knockin' on Heaven's Door" and coaches are all praise for their performance. Adam Levine goes a step further by saying that no matter who was chosen, the other singer will certainly be stolen by another coach.

In another leaked video (reported by Fashion & Style), Meghan Trainor, mentor of Team Blake, is moved to tears by their performance. "You guys are fire. You both gave me chills," she said. "Somebody hug me!"

Lionel Richie, who mentors Team Pharrell, says in the video that he loves "The Voice" because real artists teaches "artists how to be artists." He is also seen working with Anthony Riley and Travis Ewing, Sawyer Fredericks and Noelle Bybee, and Mia Z. and Ashley Morgan.

"The Voice" USA 2015 coaches - Adam Levine, Blake Shelton, Pharrell Williams, and Christina Aguilera – will pair their own team members to take on each other in the Battle Round.

Here is complete list of contenders:

Team Pharell: Lowell Oakley, Meghan Linsey, Sawyer Fredericks, Anthony Riley, Mia Z, Noelle Bybee, Travis Ewing, Kimberly Nichole, Ashley Morgan, Briar Jonnee

Team Christina: Rob Taylor, Treeva Gibson, Gabriel Wolfchild, Joe Tolo, India Carney, Clinton Washington, Sonic, Koryn Hawthorne, Katelyn Read, Ameera Delandro, Jeremy Gaynor

Team Blake: Sarah Potenza, Cody Wickline, Joshua Davis, Brooke Adee, Kelsie May, Matt Snook, Jacob Rummell, Brenna Yaeger, Brian Johnson, Corey Kent

Team Adam: Tonya Boyd-Cannon, Blaze Johnson, Deanna Johnson, Nicolette Mare, Barry Minniefield, James McNeiece, Bren'Nae DeBarge, Michael Leier, Lexa Davila, Josh Batstone, Johnny Cash