Michael Jackson was and, basically, still is the king of pop. But some kings never grow up.
In an interview with The Guardian, Russell Crowe revealed that Jackson regularly pranked called him for a couple of years.
For two or three fucking years... I never met him, never shook his hand, but he found out the name I stayed in hotels under, so it didn't matter where I was, he'd ring up do this kind of thing, like you did when you were 10, you know. 'Is Mr Wall there? Is Mrs Wall there? Are there any Walls there? Then what's holding the roof up? Ha ha.' You're supposed to grow out of doing that, right?