Demi Lovato tweeted a photo of herself in an itsy bitsy teeny white bikini — and she looks great!

“I’ve been working so hard to get healthy and fit.. I can’t believe I’m about to do this but I’m so excited,” Demi tweeted before posting the photo.

That bathing suit is hot!

Demi has been through a lot. She left her fame-making Disney channel show, ‘Sonny With a Chance,’ entered rehab to deal with physical and emotional issues and admitted to suffering from bipolar disorder.

“I never thought I’d ever feel confident enough to ever do that,” she tweeted. “I’m excited how far I’ve come since being completely ashamed of my body.”

Demi isn’t done fighting, she continues, “It hasn’t been easy, but it starts with a commitment to yourself.. Your mind.. And your soul. And trust me, I’m still working at it!!”