NBC's 'The Voice' opened Monday night's finale part 1 episode with a moving tribute to the victims of the Newtown, Connecticut school shooting.

Led by coaches Christina Aguilera, Cee Lo Green, Blake Shelton, Adam Levine and hosts Carson Daly and Christina Milian, season 3 contestants held cards with the names of those who were killed in Friday's massacre at Sandy Hook Elementary as they sang Leonard Cohen's "Hallalujah" by candlelight.