Demi Lovato is celebrating her third year of sobriety! Congrats, Demi!

The former Disney star thanked her family, friends and fans on Sunday (March 15) for supporting her on the difficult journey, tweeting: "I'm still catching up to texts and congrats tweets... Thank everyone who has supported my journey. I never knew sobriety was possible for me."

It's been a rough road for Demi, who has been open about her struggles with addiction, eating disorders and bipolar disorder.

Her boyfriend Wilmer Valderrama, formerly of That '70s Show, also publicly praised Demi on her brave journey, with a landscape painting posted to Instagram on Sunday with the caption:

"Today, we lay another stone together. / It is now 3 years since you said: /
I am more important then any past, demon, disorder or addiction.. Where you decided that YOUR life was worth living while loving yourself.. And I'm sure glad you did... I knew then the woman you've become now.. I am proud and honor to be front row to see the world you are about to change. / I love you Demi."

Demi responded to the touching post with a heartfelt Instagram snap of her own.

Demi really is looking healthier than ever and is so lucky to have a strong support base of friends and family to help keep her moving forward. We're proud of you!

See Demi's Yearbook Photo + More Celebs!

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