He's decided to celebrate by releasing an album called 'The King of Pop' (modest, eh?) and is spending his Big Day with cake and cartoons with his kids at their home in California. What? No big party? That's not what we expected.
He is, however, still looking as weird as ever - check out our now and then pictures!
Michael Jackson has gone from child superstardom to scandals, lawsuits and bankruptcy, but maybe he's finally found happiness as he reaches his half-century. He added, 'I feel very wise and sage, but at the same time very young'.
Happy birthday Michael!
Just for fun we thought you'd may like to watch the jailhouse version of Thriller from YouTube that took the world by storm when it first appeared. Click below and enjoy!