Kacey Musgraves Brings ‘The Trailer Song’ to Jimmy Fallon’s ‘The Tonight Show’Kacey Musgraves Brings ‘The Trailer Song’ to Jimmy Fallon’s ‘The Tonight Show’Kacey Musgraves debuted 'The Trailer Song' for the first time on TV, taking it to Jimmy Fallon's 'The Tonight Show' on Thursday evening (June 12).Christina VinsonChristina Vinson