Knoxville’s best-kept secret is celebrating 30 years in 2010 and will continue to entertain residents this spring. The Knoxville Community Chorus will present a combined concert with the Albia Community Chorus this Sunday at 3:30pm at the First United Methodist Church in Knoxville. They will also be performing in their annual spring concerts on Friday April 9th at the Presbyterian Church in Knoxville at 7:30pm and Sunday April 11th at First United Methodist Church 2:30pm. All concerts are open to the public. A free will donation will be taken and refreshments will be available.