As Taylor Swift’s record-breaking Eras Tour expands around the globe and onto the silver screen, CNN’s investigation into the copyright lawsuit brought by songwriters Sean Hall and Nathan Butler against Swift for her hit song “Shake it Off.”

Cast:Sean Hall, Marina V. Bogorad, Tayla Parx, Kandi Burruss, Shirley Halperin, Sidney Madden,

Genre:Documentary, Music,

country:United States of America,

Production:CNN FlashDocs,