The most performed song of all time, “Happy Birthday To You,” is now public domain thanks to the author who made a documentary about the song. by documentarynews | Aug 22, 2016 | Arts & EntertainmentHappy Birthay Song Copyright Free Judge rules Warner/Chappell Music to pay back royalty fees for the song. Read more here. Related PostsAugust 17, 2016 Happy Magazine: The Ten Best Music Documentaries on Netflix. August 7, 2017 AMC turning “The Rap Yearbook” into a documentary seriesNovember 25, 2018 The Most Feared Song in Jazz, ExplainedSeptember 14, 2016 Director Jeff Feuerzeig’s new documentary, “Author: The JT LeRoy Story,” unravels one of literature’s biggest scandals. Submit a Comment Cancel replyYou must be logged in to post a comment.