French-Canadian chanteuse Celine Dion is responsible for the world's worst cover version - a rendition of rockers AC/DC's You Shook Me All Night Long - a Total Guitar magazine poll says.
Dion has never released the song as a single but performed what the magazine called the "offence" against music at a Las Vegas concert six years ago in a duet with Anastacia.
"The number one worst cover song - Celine Dion covering AC/DC - is sacrilege," said the magazine's editor, Stephen Lawson.
"The best covers are unlikely choices and they do something radical."
Clips of Dion and Anastacia rocking are available on the internet video-sharing website YouTube.
One of the comments that doesn't use strong language read: "My poor ears."
In second place was a Sugababes and Girls Aloud version of Aerosmith and Run DMC's Walk This Way, followed by Westlife's version of Extreme's More Than Words.
Will Young's cover of The Doors' classic Light My Fire came fourth, with spoof lounge singer The Mike Flowers Pops' reworking of Wonderwall in fifth.
Jimi Hendrix's version of Bob Dylan's All Along the Watchtower was voted the best cover, followed by The Beatles' Twist and Shout, which was first recorded by The Top Notes.
Guns N' Roses' Live and Let Die (Wings); Nirvana's The Man Who Sold the World (David Bowie); Feeling Good by Muse (Anthony Newley and Leslie Bricusse) also featured in the top five.
Celine Dion's AC/DC cover an 'offence' - Music - Entertainment - smh.com.au