Darius Rucker will sing with participants in ACM Lifting Lives Music Camp at the Grand Ole Opry on Friday (July 1). Rucker and the campers, who have Williams syndrome and other developmental disabilities, will perform a song the campers wrote this year, as well as "Music From the Heart," which they performed on the ACM Awards in April. The camp began Sunday (June 26) in Nashville. The campers wrote the new song with Gary Allan, Odie Blackmon and Brett James on Monday morning. Other camp activities include a visit from Carrie Underwood during the campers' recording session; an art-inspired evening with Little Big Town that blends music and self-portraits; and karaoke night with Wynonna. ACM Lifting Lives funds the camp for the Vanderbilt Kennedy Center for Excellence in Developmental Disabilities. The medical organization improves the lives of individuals with developmental disabilities and their families through research, training and service.