His 'Bad World Tour' (1987-1989) and 'HIStory World Tour' (1996-1997) were groundbreaking, with the 'Bad World Tour' grossing $125 million for 4.4 million fans and the 'HIStory World Tour' grossing over $165 million for 4.5 million fans, making it the highest-grossing tour of the 1990s by a solo artist.