Demi Lovato and Wilmer Valderrama break up after six years of dating

Demi Lovato and Wilmer Valderrama have called it quits.

Lovato, 23, and Valderrama, 36, posted a joint statement on their Instagram accounts on Friday, calling the decision to break up after six years of dating "incredibly difficult."

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"After almost 6 loving and wonderful years together, we have decided to end our relationship," the joint statement began.

"This was an incredibly difficult decision for both of us, but we have realized more than anything that we are better as best friends," the statement continued.

"We will always be supportive of one another. Thank you to everyone who has offered us kindness and support over the years."

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In January, Valderrama spoke fondly of the "Complicated" singer in an interview with ET.

"You know, we've been best friends for about six years," he said at the time. "We haven't necessarily been dating for six years, but we have six years of friendship, and it's been beautiful."

PHOTOS: Demi and Wilmer through the years