Do you know these celebrities' real names? Miley, Drake, Gaga and more

Not all celebrities are who they say they are!

Everyone knows that many of the world's biggest stars are born with totally different names than the ones we know them by: It's a common practice for some of our favorite singers and actors to embrace a stage name that differs from the names they were born with. Maybe their chosen name rolls off the tongue more or has a nice ring to it, or perhaps it represents more of an alter ego to differentiate between public and private personas.

There's Lady Gaga, who was born Stefani Germanotta, and Miley Cyrus, whose birth name is Destiny Hope Cyrus. P!nk's actual name is Alecia Moore, Drake's is Aubrey Drake Graham and Nicki Minaj was born as Onika Maraj.

Before he adopted his stage name, Bruno Mars was Peter Hernandez, while "Royals" hitmaker, Lorde, is known as Ella Yelich-O'Connor to her friends and family.

Do you know what some of your favorite stars' true names are? Click through the gallery below to learn the real names of more of the world's most famous celebrities like Demi Lovato, Katy Perry, Olivia Wilde, Ricky Martin, Reese Witherspoon and Rihanna.

GALLERY: Check out all of these celebrities' real names:

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