What's in a name? As it turns out, maybe everything.
Since Shakespeare first posited the question in Romeo and Juliet, actors have been using fake names to land professional roles. Not only did it allow them some semblance of privacy before the dawn of Wikipedia, but let's face it, some people just aren't born with great names.
Ella Maria Lani Yelich-O'Connor? Stefani Joanne Angelina Germanotta? Quite a mouthful.
If an actor or musician's entire career is dedicated to being someone else - a character or personality, perhaps - then a good stage name can go a long way to making that career explode.
More celebrities use pseudonyms than you might think. In fact, here are 67 stars who don't use their real names. Which ones did you know before viewing this gallery?