The most popular single from Welsh rock band Catfish and the Bottlemen's debut album The Balcony. Lead singer Van McCann described the meaning behind "Kathleen" in an interview with Steve Lamacq as:
"It's about being infatuated with somebody, but in a bad way. You know, the person you call when you're tanked up and you know it's over and you know you don't get on...and you're always fighting, but something keeps bringing you back no matter how much it drives you crazy." .