Watch All Performances From The Voice Season 3 Knockout Round on Oct. 30, 2012 (VIDEOS)

Tonight was the second and final set of knockout rounds on The Voice Season 3. Team Christina Aguilera and Team Blake Shelton gave it all they had, but by the end of the night, the teams were cut in half. Watch the performances below to see what happened.  Devyn Deloera singing "I Have Nothing" by Whitney Houston and Laura Vivas singing "I Need to Know" by Marc Anthony


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