Demi has just released her personal documentary, Simply Complicated on YouTube, where she really delves into some of her more personal issues.
Like how she opened up about her recent eating disorder.
Well, fans have been epically praising Demi for being so candid with her fans, but Selena has also shown her support.
Selena commented on Demi's Instagram photo promoting the documentary, writing: "This was beautiful. I'm so happy for you. You always continue to be bold and real. I wish more people were like you. Love you."
Ah, they've come so far from their Barney days.
You can see Demi's complete documentary, Simply Complicated below: