Prince (Kevin Mazur/WireImage)

Prince‘s landmark album and film Purple Rain turned 30 this week, and the singer marked the occasion Saturday night with a late-night surprise concert at Paisley Park, featuring a very special guest: Purple Rain co-star Apollonia Kotero made her first ever visit to the estate.

According to Consequence of Sound, Kotero wrote about the experience on her Facebook page, in a post which now appears to have been removed.

“4:42 A.M. in Minneapolis , just had a private