'The Voice' Enlists Reba McEntire, Sia, Monica and Adam Blackstone As Advisers

'The Voice' just added a little more star power to its roster as Sia, Monica, Reba McEntire and producer Adam Blackstone join the competition series as advisers.

The music pros will help coaches Christina Aguilera, Cee Lo Green, Adam Levine and Blake Shelton in the battle competition phase.

According to NBC, Sia will team up with Xtina (just think of the rhyming capabilities!); the two Adams (Levine and Blackstone) will work together; Cee Lo is teamed with Monica; and Shelton is with country superstar Reba McEntire. The coaches will work with advisers to pit their own artists against each other, cutting the teams in half via dueling duets.

The coaches chose their advisers. Look for the new additions to help select songs that suit the contestants. NBC said the adviser rosters will expand as the competition heads toward live performances.

'The Voice' debuted to strong ratings last Tuesday, pulling in a 5.1 share in the 18–49 demographic and 11.8 million total viewers. The next episode airs Tues., May 3 at 9PM.