Sure, they passive-aggressively unfollowed each other on social media back in March, but Lovato sealed the deal publicly during a radio interview in Boston.
"Um, yeah -- that, um, we're, we're like, we're acquaintances," the "Heart Attack" and "Skyscraper" singer said Monday on 103.3 AMP radio's "The TJ Show" after a listener asked if they were still friends.
"It's life, and people change, and, you know, I don't have anything in common with her anymore, and I wish her all the best."
So, not aggressive, but not exactly passive anymore either. Lovato of course spent months in rehab a few years ago, coming to grips with depression, cutting and eating disorders and ultimately emerging with a renewed perspective on life.
Still, nothing in common? Really? Why, Miley marked her 22nd birthday on Saturday at a West Hollywood club with a cake decorated like a massive pepperoni pizza, the birthday girl decked out in a massive amount of neon color and a mechanical bull in the shape of a massive pink penis.
Plus a Schwarzenegger -- Patrick Schwarzenegger -- in a pilot's jumpsuit, People reported.
Meanwhile, Lovato was tweeting Monday, "I feel like I don't fit in with Hollyweird at all and I'm actually kind of proud/happy about that."
You go, Demi.