"The Voice" paid tribute to Sandy Hook victims on Monday night.

Judges Cee Lo, Christina Aguilera, and Adam Levine sang "Hallelujah" along with past and present contestants, and the show’s hosts as candles lit the stage. While they sang, they each held a sign with the name of one of the 26 victims killed in the Sandy Hook tragedy by 20-year-old gunman Adam Lanza.

Lanza went into Sandy Hooks Elementary school in Newton, Conn., this past Friday taking 26 lives, including 20 children.

President Obama spoke at the interfaith vigil in Newtown, Conn., on Dec. 16 in honor of the victims of the shootings, and said, in part “We gather here in memory of twenty beautiful children and six remarkable adults.

"They lost their lives in a school that could have been any school; in a quiet town full of good and decent people that could be any town in America.

"Here in Newtown, I come to offer the love and prayers of a nation. I am very mindful that mere words cannot match the depths of your sorrow, nor can they heal your wounded hearts.

"I can only hope it helps for you to know that you're not alone in your grief; that our world too has been torn apart; that all across this land of ours, we have wept with you, we've pulled our children tight.”

Two of the young victims, Jack Pinto and Noah Ponza, both six-years-old, were the first to be buried on Monday.

Watch the video of "The Voice" paying tribute to Sandy Hook victims below: