Knoxville’s Community Chorus will perform two holiday concerts this weekend. The performances will be tonight at 7, at St. Anthony’s Catholic Church in Knoxville, and at 2 tomorrow, at First United Methodist Church. The concerts will showcase holiday music, and Vicki Kaster, President of the Community Chorus says the concert will also feature a quartet “A Thorn Among Roses,” which is known for their offbeat, humorous numbers. Everyone is invited to attend, and a free-will offering is appreciated.