“A very interesting, unexpected twist. Some friends of mine told me that they had seen Daughtry and that they were playing this live; it was part of their normal routine. So they had a leg up on things from the start. ‘We’d like to do this,’ the guys said. ‘In fact, we already do!’ [laughs]

“No matter who you assign to deliver an interpretation of the solos, a challenge is presented. When ZZ Top cut these tracks, back in 1973, we were still learning the ropes in the studio. But we charged large and had happy accidents. I played with a broken wah-wah pedal, but we left everything as it was.

“How would you throw that into somebody’s lap and say, ‘OK, go learn this’? But you really don’t have to, because it’s all in the spirit of rock ‘n’ roll. At the end of the day, as long as everybody’s smiling, the job has been done.

“The guitar work here is great. A lot of the time, whenever you hear a cover version, you go, ‘Why are they trying to horn in on this thing?’ This one's got the goods.”