As a rich Abilene Christian University tradition since 1956, approximately one-third of ACU’s student body participates in Sing Song each year where a top men's social club, women's social club and mixed voices group (usually a class) are crowned for having the best three-and-one-half-minute song medley. 

The medleys compile popular songs with humorously rewritten lyrics to reflect the act's theme. Groups are also judged on how their original choreography and costumes enhance their act’s theme. Hosts and hostesses, a jazz band and dance teams keep the show moving between acts. 

Thousands of ACU alumni, students, parents and future students attend Sing Song each year, with the final show on Saturday typically selling out in advance.