Thomas Rhett penned this '50s throwback cut with his "Die a Happy Man
" collaborators Sean Douglas and Joe Spargur, along with his father Rhett Akins. "I really wanted to write a simple love song," Rhett told Billboard
magazine. "A lot of times as songwriters, we try to over analyze every lyric, but what the '50s did so well - when you listen to Sinatra songs, why do we like them so much? It's because it's just easy to digest and it makes you feel amazing. We wanted to write a song like that, so that's where 'Sweetheart' was born."