What royalty has recorded a song with Michael Jackson?

Explanation

Princess Stéphanie, the youngest child of Grace, Princess of Monaco and Rainier III of Monaco, first started her pop career in 1986, when she released her first single "Ouragan" ("Hurricane"). It quickly reached the international Top 10, reportedly selling more than 2 million copies. In 1987, Stéphanie moved to Los Angeles to pursue her career, but her second record flopped. She recorded "In the Closet" with Michael Jackson under the alias of Mystery Girl for his album, Dangerous. She then ended her pop music career.