NBC is upping the star power on "The Voice" by adding singers Reba McEntire, Monica and Sia and music producer Adam Blackstone as new advisers.

They join Christina Aguilera, Cee-Lo Green, Adam Levine and Blake Shelton. Aguilera will team up with Sia, Levine with Maroon 5 music director Blackstone, Green with Monica, and Shelton with McEntire, who goes by just Reba these days.

The coaches will eventually pit two of the artists on each of their teams against each other in a series of dueling duets. Each of the coaches chooses advisers to help at the next Battles stage, lasting four episodes, NBC said.

Courtesy of thewrap.com.