A never-before-heard single recorded by Michael Jackson prior to his death, entitled 'This Is It,' was released today. But some people may have actually heard the song before -- by another artist.

According to TMZ, Paul Anka co-wrote the song -- called 'I Never Heard' -- with Jackson back in the '80s, but then the 'Thriller' legend stole the tapes before Anka could finish the tune. Jackson eventually returned them, but Anka claims the late King of Pop kept a copy and used it as material to record 'This Is It.'

Anka gave the song to Safire, who released it in 1990. Listen to them both.


'This Is It'

'I Never Heard'