Elvis Costello dropped by Letterman to help out Jenny Lewis on “Carpetbaggers”—the song he’s featured on on her album, Acid Tongue. I haven’t heard the song until now, but I’m struck by how similar it sounds to mainstream country. Costello is the song’s highlight—I’d listen to him read the phone book and be entertained. Lewis and company, not so much.

Acid Tongue is out now via Warner Brothers. [Stereogum]