Buddy Jewell, Sherrié Austin and Lila McCann will be donating their time Sunday night (Feb. 8) during Joe Diffie's 12th annual concert to benefit First Steps, a private, non-profit organization assisting in the education and development of children with special needs. In past years, Diffie's concert at Nashville's Ryman Auditorium has featured numerous unannounced guests, including Tim McGraw and Wynonna.