Only 90 seconds of the tune is currently available, and features Jackson singing: "My life has taken me beyond the planets and the stars/ And you're the only one that could take me this far/ I'll be forever searching for your love."
TMZ reports the song was recorded as a duet with Lenny Kravitz, and according to Rolling Stone, Another Day shares some similarities with an old song of Kravitz's, Storm, off his 2004 record Baptism.
Kravitz doesn't sing on the leaked clip, but shortly after Jackson's death, the rocker wrote a letter to Spinner, talking about his time working with the late King of Pop.
"I got to work with Michael on a track that has not been released, and it was the most amazing experience I've had in the studio," Kravitz told Spinner. "He was funny; very funny and we laughed the whole time. I also saw what a beautiful father he was. He was a beautiful human being."
However, TMZ posted a later story citing sources insisting the song was never meant to see the light of day. Sony, with the support of Jackson's estate lawyers, wants to have the song pulled off the Internet, TMZ reported.
For his part, Lenny Kravitz posted a video saying he didn't leak the song and he has no idea how it got out there.
He says the song is not mixed and not a final version.
-- Canwest News Service