The Voice determined the last eight of its 16 "knockout" round winners, who will advance as finalists to the live shows, during Tuesday night's broadcast of the NBC reality singing competition's fourth season.  

The Voice musician coaches Usher and Blake Shelton have each whittled down their fourth-season teams from eight to four acts via four separate faceoffs per team with the conclusion of the season's "knockout" round.

For the "knockout" round, each artist on every team performs individually against one of his or her own teammates one at a time. The contestants, who are able to select their own songs to perform, are surprised at the last minute by whom their coach chooses to put them up against.

Blake chose to pit Danielle Bradbery, who sang "Jesus Take the Wheel" by Carrie Underwood, against Taylor Beckham, who performed "Russian Roulette" by Rihanna. Danielle from Cypress, TX came out ontop.

Blake put Savannah Berry's rendition of "As Long As You Love Me" by Justin Bieber against Justin Rivers' "The Climb" performance, and Justin from Bowling Green, KY won. "The Climb" is by Miley Cyrus.

Also for "Team Blake," Holly Tucker sang against Luke Edgemon. After Holly sang "Live Like You Were Dying" by Tim McGraw and Luke performed "Teenage Dream" by Katy Perry, Blake decided to advance Holly from Lorena, TX in the competition.

Blake also had Grace Askew perform against Colton Swon and Zach Swon from Muskogee, OK -- a duo who perform as The Swon Brothers -- and the coach picked The Swon Brothers. Grace sang "I Can't Stand the Rain" by Tina Turner, and The Swon Brothers performed "Drift Away" by Dobie Gray.

Usher chose to pit Josiah Hawley, who sang "Back to Black" by Amy Winehouse, against Jess Kellner, who performed "You Give Me Something" by James Morrison. Josiah from Ft. Smith, AR came out ontop.

Usher put C. Perkins' rendition of "She Ain't You" by Chris Brown against Vedo's "(Everything I Do) I Do It For You" performance, and Vedo from Decatur, CA won. "(Everything I Do) I Do It For You" is by Bryan Adams.

Also for "Team Usher," Audrey Karrasch sang against Michelle Chamuel. After Audrey sang "How to Love" by Lil Wayne and Michelle performed "Raise Your Glass" by P!nk, Usher decided to advance Michelle from Amherst, MA.

Usher also had Cathia perform against Ryan Innes, and the coach picked Cathia from Bronx, NY. Cathia sang "Mr. Know It All" by Kelly Clarkson, and Ryan performed "I Don't Wanna Be" by Gavin DeGraw.

Cathia and C. Perkins had been stolen by Usher for his team during previous "battle" rounds, while Luke and Taylor had been the artists stolen by Blake.
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The eight "knockout" round winners join the eight finalists who advanced during Monday night's The Voice episode.

Now that the "knockout" round is over, next week will begin the live "Playoffs" in which the Top 16 artists will perform live for home viewer votes.