Fans and friends were left shaken on Thursday as the news of the music icon's fatal heart attack reverberated around the globe.
And as the news broke, celebrities from music, film and TV took to their Twitter.com pages to explain how the legend had affected their lives and describe their devastation at his untimely demise.
Big-screen veteran Jane Fonda was one of the first to express her upset, remembering the time Jackson came to live with her after he completed filming on his iconic "Thriller" video.
She writes, "I am stunned. My friend, Michael Jackson is dead. He lived with me for a week on the Golden Pond set after Thriller."
Actress Demi Moore joined in with her husband Ashton Kutcher's plea for the media to respect the privacy of Jackson's three children, tweeting, "I plea to the public to refuse to consume media that does not respect the anonymity of Michael's children."
And young music stars, who had been inspired by the pop singer's four-decade-spanning career, joined in the tributes.
Miley Cyrus wrote, "Michael Jackson was my inspiration. Love and blessings," while rocker John Mayer added, "I truly hope he is memorialized as the '83 moonwalking, MTV owning, mesmerizing, unstoppable, invincible Michael Jackson."
Sean 'Diddy' Combs explained how much he would miss the superstar: "Michael Jackson showed me that you can actually see the beat. He made the music come to life!! He made me believe in magic. I will miss him!"
And even the world of politics failed to escape feeling the overwhelming loss of pop's greatest performer -- former action star-turned-California Governor Arnold Schwarzenegger sent out his thoughts to those closest to Jackson.
He adds, "We lost a great entertainer and a pop icon. My thoughts and prayers go out to Michael Jackson's family, friends and fans."
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