Shelton, 36, and Lambert, 29, delivered a touching and somber "Over You" as the show called its fans to donate to the Red Cross and its relief efforts for victim families and survivors of the deadly storm, which smashed into Moore, Okla., about 100 miles from the couple's home.
"I think "Over You" was the perfect song for this situation," Shelton said after the show. "The moment was right. I wish things could have been different. I wouldn't have thought about performing a song like that, but it seemed like the right thing to do."
Shelton said he is working with NBC on a concert to aid the storm victims and hope to come up with something fitting.
"Hopefully, it will be something big and will raise a lot of money, and obviously it will be televised. It will happen really quickly and, hopefully, I can call in some really big favors," Shelton said, pointing to his fellow coach, Usher.
Shelton and Lambert co-wrote the touching tribute song, which honors Blake's brother who passed away as a teenager in a car accident in 1990.
GlobalGiving is raising funds for emergency supplies for victims, as well as longer-term relief and rebuilding efforts. Donate online or text GIVE OK to 80088 to donate $10 to GlobalGiving's Oklahoma Tornado Relief Fund. Message and data rates may apply. Terms: mgive.org/t