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Michael Jackson's new single This Is It was actually written in 1983,
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Representatives of Jackson's estate were forced to make the acknowledgement after songwriter Paul Anka revealed he had written the track with the singer.
The pair penned the track – originally called I Never Heard – for a duets album Anka was recording,
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However,
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"They did the right thing," Anka told the Press Association.
"I don't think that anybody tried to do the wrong thing. It was an honest mistake."
Anka has now been credit for the song and will receive 50% of the track's profits.
A statement from the Jackson estate said: "The song was picked because the lyrics were appropriate because of the name Michael gave his tour.
"We are thrilled to present this song in Michael's voice for the first time and that Michael's fans have responded in unprecedented numbers."
This Is It is taken from the soundtrack to the forthcoming Michael Jackson movie of the same name.
The movie shows footage of the late singer,
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Michael Jackson - This Is It