Thanks to social media, there's never been a better time for musicians, actors, and reality stars to promote themselves, giving the world insights into everything from their newest release to their latest family holiday. 

However, in the realms of the super-rich – and whether they're creative, criminal or simply famous for being famous – there are some people who prefer to stay tight-lipped about their private lives, including their real identities.

Read on to find out why these super-rich stars don't want you to know who they are. All dollar amounts in US dollars unless otherwise stated.