The Truth in Music Advertising act or bill, also known as Truth in Music Performance Advertising or simply Truth in Music, is legislation, adopted into state law by most U.S. states, that aims to protect the trademark of musical recording artists. The legislation provides that the name of a famous musical group cannot be used by a group of performers unless they include at least one member of the original group. The intent of the legislation is to prevent unfair or deceptive trade practices, and to protect the livelihood of musicians who were in famous musical groups.