Pop superstar Michael Jackson performs during a concert in Sao Paulo, Brazil, in this October 15, 1993 file photo. Jackson's album "Thriller" is still breaking barriers more than 30 years after its release and six years after the pop superstar's death, becoming the first album in history to cross the 30 million mark in U.S. sales, record industry officials said December 16, 2015. REUTERS/Marcos Pacheco/Files