Now that is a hard question...
Jethro Tull - Heavy Horses
Ian Anderson wrote the lyrics in the studio whenthey were laying down the music
Led Zep 2 er no 4 errrr Phys graf....errrrrrmm no, hang on, Song remains the same...I think!
Joe Bonamassa - New day Yesterday
(because I play it lots at the moment - he's great!)