It's been quite the year for Demi, not only has she released some awesome music but she also landed the job of all jobs, as a judge on X-Factor.
She hasn't hinted to any birthday plans on Twitter yet, but one person you might know did wish her a happy birthday.
Niall Horan from One Direction tweeted his rumored love interest a cute, birthday wish via Twitter that hints to them seeing each other soon.
"@ddlovato happy birthday honey! Have a lovely day! See ya soon," he tweeted.
Unfortunately, 1D fans started a horrible Twitter trend about Demi because of his tweet to her. Ugh! How lame!
For those of you who love Demi and want to wish her a happy birthday or tell her how much she means to you...GO HERE!
Happy Birthday Demi! We hope you have an awesome day!
Get the latest Demi news here!
READ: Find out 5 cool things you might not know about Demi here!
It's the bomb: Check out some hilarious photobombs and vote for your faves right here!