UPDATE: You can listen to the new song here.

The debut of Michael Jackson’s unreleased song will premiere just weeks before the opening of his documentary.

“This Is It,” which is also the title of the upcoming film, will debut online this Monday on the singer’s official website.

The single, which features backup vocals from his brothers, is just one of 20 selections being offered in a two-disc set. (You can see the track listings after the jump.) Those with tickets to Jackson’s London concerts would have heard the songs in the order they are being presented on the first CD.

Disc Two features demos of three of his songs and “Planet Earth,” a spoken word piece. Meanwhile, the package will also include a 36-page booklet comprised of photos from his last tour rehearsal.

The soundtrack will become available on Oct. 27, the same day special advance screenings of This Is It begins in theaters. A wider release of the limited-run film will then start on Oct. 28.

This Is It (Disc One)

1. “Wanna Be Startin’ Somethin’”
2. “Jam”
3. “They Don’t Care About Us”
4. “Human Nature”
5. “Smooth Criminal”
6. “The Way You Make Me Feel”
7. “Shake Your Body (Down To The Ground)”
8. “I Just Can’t Stop Loving You”
9. “Thriller”
10. “Beat It”
11. “Black Or White”
12. “Earth Song”
13. “Billie Jean”
14. “Man In The Mirror”
15. “This Is It”
16. “This Is It (Orchestra Version)”

This Is It (Disc Two)

1. “She’s Out Of My Life (Demo)”
2. “Wanna Be Startin’ Somethin’ (Demo)”
3. “Beat It (Demo)”
4. “Planet Earth (Poem)”