Michael Jackson Felt 'Young' at 50, Never Reached 51

Michael Jackson may be gone, but that won't stop thousands of fans from around the world from celebrating the King of Pop on what would have been his 51st birthday.

Share Anti-anxiety medications and marijuana may have caused Jackson's death.

Only a year ago, on the eve of his 50th birthday, Jackson was planning a much more low-key celebration of cake and cartoons with his three children when he spoke with ABC News' Chris Connelly exclusively by phone from his home in California.

In Jackson's final television interview before his death on June 25, the pop superstar dropped hints of a comeback in the works. He boasted about still having his signature moves – and showing off some new ones – saying his greatest achievements lay ahead.

Jackson died as he was mounting his comeback tour in London, doing what he told Connelly he loved the most: performing.

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ABC / Thanks Sheril!