By the end of the show, America will be deciding who has the voice to the champion of season 6 of 'The Voice', which makes its debut tonight on NBC. Blake Shelton and Adam Levine return for season six and will be joined by Shakira and Usher for their second seasons replacing Christina Aguilera and Cee Lo Green, who recently announced he wouldn't be returning for season seven.

In an extended promo for the new season that recently ran during Olympics coverage, the first night of the show will feature the judges performing each others' hits. Shakira and Shelton trade off on tunes and Usher and Levine will be trading off on their songs as they get ready for the blind auditions and form their teams. Throughout the years, Team Adam has been successful twice and Team Blake has won it three times. Adam is approaching this season in a fun, competitive way whereas Shakira is out for blood he says!

Season six gets underway tonight at 7p on NBC.