The students of Henryville Junior-Senior High School won an online contest to have the Grammy-winning trio perform at their prom.
The band missed the real prom last month due to scheduling, but they performed at a more casual prom-like party on Wednesday at an arena in downtown Louisville overlooking the Ohio River.
A tornado in March destroyed the school and damaged many homes in the community of Henryville, Ind.
"Each and every one of you have inspired us, and we're so honored to be here, I know it's your second prom technically," said singer Hillary Scott.
Scott and another band member, Charles Kelley, selected two students to dance with during the short acoustic show.
Kelley said the band hoped to lift the Henryville community's spirits.
"We want to just go there and hopefully bring a little joy, meet them, shake their hands, encourage them to try to get through it as best as they can," the singer said.
The Associated Press contributed to this report.