Christina Aguilera, Blake Shelton, Adam Levine & Cee Lo Green Tribute Sandy Hook Victims with ‘Hallelujah’ Performance [Video]

With help from the contestants, Christina Aguilera, Adam Levine, Blake Shelton, Cee Lo Green performed an emotional tribute to the fallen victims of the Sandy Hook shooting. Watch below as they perform a heartfelt rendition of “Hallelujah.”