Italian tenor Luciano Pavarotti (L) performs with British pop singer George Michael during a "Pavarotti & Friends " concert in Modena June 6, 2000. (Reuters)

George Michael leaves a news conference for the film 'George Michael - A Different Story' in Berlin February 16, 2005. (Reuters)

George Michael, left, and Paul McCartney, right, perform during the Live 8 concert in Hyde Park, London. The concert is part of a series of free concerts being held around the world designed to press leaders of the rich G8 countries to help impoverished African nations. Michael, who rocketed to stardom with WHAM! and went on to enjoy a long and celebrated solo career lined with controversies, has died, his publicist said Sunday, Dec. 25, 2016. He was 53. (AP)

pop star George Michael, 30, outside the Royal Courts of Justice in London at the start of his court action against Sony Music Entertainment (UK) Ltd. Michael, who rocketed to stardom with WHAM! and went on to enjoy a long and celebrated solo career lined with controversies, has died, his publicist said Sunday, Dec. 25, 2016. He was 53. (AP)

British singer George Michael performs at a concert to raise money for the AIDS charity Sidaction, during the Symphonica tour at Palais Garnier Opera house in Paris, France. Michael, who rocketed to stardom with WHAM! and went on to enjoy a long and celebrated solo career lined with controversies, has died, his publicist said Sunday, Dec. 25, 2016. He was 53. (AP)

George Michael

Singer George Michael performs during the closing ceremony of the London 2012 Olympic Games at the Olympic Stadium August 12, 2012. (Reuters)

George Michael performs in concert at the Forum during his "Live Global Tour" in Inglewood, California June 25, 2008. (Reuters)

British singers Paul McCartney and George Michael (L) perform at the Live 8 concert in Hyde Park in London, July 2, 2005. (Reuters)

Shows British singer George Michael performing during a concert in Amsterdam. (AFP)

Princess Diana chats with singer George Michael before the start of the Concert of Hope at Wembley Arena in London to mark World AIDS Day December 1, 1993. To the immediate left of George Michael is singer K.D.Lang of Canada, and to the right Mick Hucknall of Simply Red. (Reuters)

George Michael performs at the closing ceremony of the London 2012 Olympic Games at the Olympic stadium August 12, 2012. (Reuters)

Shows British singer George Michael talking about his recent illness outside his home in Hampstead in London. George Michael died aged 53, according to his publicist on December 25, 2016. (AFP)

Shows British singer George Michael presenting an awards at the BRIT Awards 2012 in London. George Michael died aged 53, according to his publicist on December 25, 2016. (AFP)

George Michael performs at "Concert of Hope" to mark World AIDS Day at London's Wembley Arena. According to a publicist on Sunday, Dec. 25, 2016, the singer has died at the age of 53. (AP)