All any large-scale TV parties, square literary evenings, all kinds of star concerts, etc., the actors' costumes are self-provided, and the organizers do not undertake.
Because the actors (including backup dancers) have costumes and make-up included in their appearance (performance or labor) fee.
Television station's party (program), host clothing is generally corporate sponsorship; other types of parties, concerts, hosts and actors, as well as clothing and make-up is also self-provided.