What album by American musician Prince was the first to feature his band The Revolution and had the contoversial song Darling Nikki which eventually led to the use of "Parental Advisory" stickers and imprints on album covers? 
Darling Nikki:  Partly because of the lyrical content of "Darling Nikki", Tipper Gore founded the Parents Music Resource Center, which eventually led to the use of "Parental Advisory" stickers and imprints on album covers. Purple Rain (album): Purple Rain is the sixth studio album by American recording artist Prince, the first to feature his band The Revolution, and is the soundtrack to the 1984 film of the same name.
Purple Rain