Madonna mourns Prince as 'true visionary'

Madonna mourned fellow 1980s pop icon Prince as a "true visionary" after his sudden death at age 57 today.

"He changed the world!! A true visionary. What a loss. I'm devastated," Madonna wrote on Instagram, where she posted a picture of herself with the Purple One.

Madonna had a tumultuous relationship with Prince. They briefly dated in the 1980s before a long feud that they had since resolved.

Prince, a legendary guitar player, performed on her 1989 "Like a Prayer" album, with the track "Love Song" recorded at his Paisley Park studio where he died.

Madonna included a lyric from the track in her Instagram post: "This is not a love song."
 

With the deaths of Prince and of Michael Jackson in 2009, Madonna -- who tours actively -- is arguably the biggest of the 1980s superstars to remain alive.