Original members Jackie, Tito, Jermaine, Marlon, Michael (and later Randy) were the voices behind iconic hits "I Want You Back" and "ABC." During their on and off career, which started in 1964, they have sold over 100 million records worldwide. They were inducted into the Rock and Roll Hall of Fame in 1997 -- 13 years after Michael (who died in 2009) left to pursue his solo career.