Christian adult contemporary, also known as Christian AC or CAC, is a radio format. In the United States, Christian adult contemporary radio stations cater to a mostly adult audience and are similar to mainstream adult contemporary stations in that they play hits often and for long periods of time.[1] A Christian AC station may play contemporary Christian music, but it usually excludes Christian hip hop and some forms of Christian dance-pop and teen pop, as these are less popular among adults, the target demographic.