Prince

Prince is an American guitarist and singer.

History
When Comic Book Guy went online to find out who was going to star in the forthcoming Radioactive Man film, Prince was among the geeks who received his "Need know star RM pic" inquiry.

Homer told the story of how Lisa got her saxophone. To place the story in its setting (in 1990), one of the pieces of background information he cited was "Back then, 'The Artist Formerly Known as Prince' was currently known as 'Prince'."

Non-Canon
When Homer was killing celebrities, one of his victims was Prince, whom he beat and stabbed with his own guitar."

Kang and Kodos hosted a television special where all the celebrity guests were killed and their bodies placed to spell out the episode title. Prince was the "S" in "TREEHOUSE OF HORROR XXV".

Kirk Van Houten threw out a Prince album from his cupboard.

Behind the Laughter

 * In 1993, due to a dispute with his record company, Prince changed his stage name to the "Love Symbol", which he explained as being a combination of the for male and female. There was no pronunciation for the symbol, so in written and spoken discourse he was referred to as "The Artist Formerly Known as Prince", or simply "The Artist". The change lasted until 2000, when The Artist changed his stage name back to "Prince", so he was performing as the Love Symbol when "Lisa's Sax" originally aired, as referenced by Homer when he tells the story.
 * Prince's stage name change is also referenced in "Two Dozen and One Greyhounds" when two of the puppies are named "Prince" and "The Puppy Formerly Known as Prince".
 * Prince was lined up to appear in an unproduced sequel to "Stark Raving Dad" as Leon Kompowsky. Although he initially accepted the role, it transpired that the script he received was not the one written by the staff. Prince subsequently declined to appear using the staff's script, and so the episode was never made.
 * In real life, Prince passed away on April 21, 2016, aged 57.