“Thanks a Lot” was written by Eddie Miller and Don Sessions. Ernest Tubb recorded it in 1963, and it became his biggest hit of that decade.
The song is a bitter, ironic thank-you. The singer has been left brokenhearted by a woman who feels no regret, and he turns the language of gratitude against her — thanks a lot for the heartache and the loneliness she handed him.
The song’s wry heartbreak carried it into bluegrass.