1999

Over the years, no single song – with the undeniable exception of "Purple Rain" – has done more to introduce or define Prince to the world than "1999."

Pay-per-view special on New Year's Eve was supposed to be the final performance of the apocalyptic classic.

The music video marked a turning point for both the artist and the network.

An iconic purple trench coat is among the clothing collection's items.

Breakthrough LP expanded to five discs of B-sides, outtakes and live tracks.

Four-part series features a preview of some of the unreleased music in the upcoming box set.

Song is the third advance track from upcoming Super Deluxe edition of fifth album.

Morris Day plays drums on this previously archived version of a '1999' track.

The footage is part of the expanded re-release of '1999,' due out this fall.

Two discs of unreleased material highlight the expanded edition of 1982 double album.