After sharing the name and tracklist of her next album earlier todayJanet Jackson just delivered the title track, "Unbreakable," on Twitter. The song is the first we've heard from Jackson since she returned with a J. Cole feature in the form of "No Sleeep" a couple months back. Check out "Unbreakable" above and brace yourself for the album, which also features Missy Elliott, due out on October 2.