Michael Jackson, the King of Pop, would have been 56 today. Since his death five years ago, his birthday has become an occasion for both nostalgia and celebration of the contribution he made to the world of music. The legendary artist has been named the most successful entertainer of all time by Guinness World Records. His contribution to music, dance and fashion made him a global icon for over four decades. He is one of the few artists to have been inducted into the Rock and Roll Hall of Fame twice.