Keith Creighton

Over a dozen previously unreleased Prince '1999'-era songs are heading your way - here's what you need to know about them.

“Guitar” showed up smack dab in the middle of his last act, and while the lyrics are an ode to his love of the six-string, the musical arrangement is all talk and no action.

Is Prince's "Dream Factory" about a person, place or thing? Diffuser explores all three theories about the legendary 'Crystal Ball' track.

The unreleased original version of Prince's "Old Friends 4 Sale" is a requiem for the end of Jimmy Jam and Terry Lewis's original run in the Time.

Prince uses some cunning wordplay to balance sensuality and spirituality on "Elixer," the title track of Bria Valente's self-titled album.

Prince's "Strange Relationship" was earmarked for three other albums before landing on his opus, 'Sign O' the Times.'

"Warden in the Prison of Love" is Prince's love letter to Margie Cox, singer of Minneapolis legends Dr. Mambo's Combo.

In 1988, Prince contributed "Good Love" to the soundtrack of "Bright Lights. Big City" starring Michael J. Fox.

Prince hands the spotlight -- and the royalties -- over to Sheila E for "Holly Rock" from the 'Krush Groove' soundtrack.

Prince addresses drugs, sex, religion and music in the unreleased 10-minute dance opus, "Purple Music."