song with Billy Joel at Madison Square Garden in New York, US in March 2014. The Salon publication stated on the following morning in its introduction to the video footage of the performance: "This will either be your favorite video today, or a total musical nightmare!" Composition The song is in the key of G major. The main verse and riff follows a G–C–D chord progression. Controversy There have been several claims made over decades that (at least) some parts of the lyrics to the song were written by Bon Scott. Silver Smith, late former girlfriend of Bon Scott, interviewed by Jesse Fink for his biography of Scott, Bon: The Last Highway, said: "I know for sure that [the song] was written at [my flat in] Gloucester Road [in Kensington, London] back in ’76. 'She told me to come but I was already there' – he wrote that in a letter to somebody, one of his grotty mates, just after we got together, actually. He always kept notebooks and added and subtracted to them and so on. He put in 'American thighs' even way back then, because that was the market they were going to try and crack. So that was written a long time ago." In the same book, Scott's girlfriend in Miami, Florida, a woman under the pseudonym "Holly X", says the original lyric "chartreuse eyes" was changed to "sightless eyes" and that she had a horse called Doubletime. The lyrics "working double time on the seduction line" appear in the finished song. Doug Thaler, Bon's friend and AC/DC's booking agent on their American tours, also says: "I don’t care who tells me anything different: you can bet your life that Bon Scott wrote the lyrics to 'You Shook Me All Night Long'. It's Bon Scott's lyrics all over the place." From AC/DC: Hell Ain't a Bad Place to Be by Mick Wall: "However Malcolm Dome claims that shortly before he died, Bon 'shoved me his book of lyrics. He had sheets of lyrics that he kept in a file, carried them around. He'd been showing me some of the ideas he'd been working for Back in Black. Not the song 'Back in Black' but songs that were for the next album. There were a couple of lines, like, 'She told me to come but I was already there', which ended up in 'You Shook Me All Night