Michael Jackson was known as the King of Pop, and with four decades worth of smash-hit pop music, he made an incredibly positive impact on the world of music.

Between 1979 and 1991, Jackson released hit after hit on each album, from Off the Wall to Dangerous, and was nothing short of a worldwide musical sensation. With record-defying success and an untouchable music career, the singer was practically invincible.

He may have been untouchable for a time, but Jackson’s favorable public reputation began to dwindle once the first sexual abuse allegation was made against him in 1993, and his personal life and career began to derail.

To this day, fans and followers remain divided on their opinions of the singer and the allegations against him, and Jackson’s lifelong legacy continues to be at stake — most notably with HBO’s recent and highly controversial four-hour documentary,  leaving Neverland, which aimed to expose the allegations against the singer.

Ahead of his unexpected death and after a multi-year hiatus, Jackson was gearing up for a massive global comeback: the This is It residency, which was scheduled for 50 dates between 2009 and 2010 at London’s O2 Arena.

He made the iconic announcement on March 9, 2009 at a televised press conference in front of more than 3,000 fans, with hundreds of thousands more watching across the planet.

The This is It residency was revealed to be his final series of concert dates, and while they unfortunately never took place, Jackson’s announcement proved that he was missed by many.

Here are some more of Jackson’s most iconic moments throughout his career.