Demi Lovato recently said she's 'not friends' with Selena Gomez. Here's everything we know about their 18-year-long friendship.

Demi Lovato and Selena Gomez have been friends since they were young.Disney; Donato Sardella/Getty Images for InStyle

• Demi Lovato and Selena Gomez's friendship dates back to when they both appeared on "Barney and Friends" in 2002.
• Once inseparable, their relationship has faced ups and downs as both of their careers have progressed.
• Although they've shown support for each other in recent years, Lovato confirmed that they're "not friends" in an April 2020 interview with Harper's Bazaar.
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Demi Lovato and Selena Gomez have been linked for 18 years; their friendship spans back to when they both landed their first roles on "Barney and Friends."

In their childhood and adolescence, the duo was inseparable. They supported each other as Disney Channel stars, costarred in a Disney Channel Original Movie (DCOM) together, and promoted each other's burgeoning music careers. But as their careers progressed, their relationship hasn't been completely straightforward.

They've exchanged public messages applauding each other's success in recent years, however Lovato confirmed that they're "not friends" in a Harper's Bazaar interview in April 2020.

From their "Barney" days to today, here's everything we know about Gomez and Lovato's complicated friendship.