Today is Demi Lovato's 22nd birthday! It's hard to believe that the former Disney star is all grown up — we remember watching her on Barney when she was just 10 years old. From friendship drama to new relationships, we feel like we've been with Demi through it all.

However, after all these years, we're surprised by some of the things we didn't know about her. Like, the singer's real name isn't even Demi!

Click through to see 10 mind-blowing facts about the birthday girl, then let us know in the comments below which information shocked you the most. Don't forget to wish the singer a happy birthday!

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