The term "crossover artist" may refer to musical performers and groups that are Christian music artists, who many times originally are marketed through Christian record labels, radio stations, churches and other Christian media but who start selling in mainstream secular markets as well. Other times, crossover artists may start out in the mainstream market but have Christian undertones or themes if not overtly Christian. The term "crossing over" is used to describe when an artist who had started predominantly in Christian markets starts receiving mainstream success. Some people may feel that the artist is betraying the church for fame or glory, while others may see this as a great opportunity for the artist spread the message of their Christian beliefs.