The “Confident” singer wore the chic two-piece number with a pair of basic black sunglasses for an impromptu photo shoot.

Demi Lovato posted a series of bikini photos to her Instagram on May 8, in which she wore a high-waisted strapless black swimsuit. See the photos here.

"CAST Centers has played an extremely important role in my life," Lovato says of the facility where she was once a patient Demi Lovato leads ... “I would say … the word that I want to say ...

Demi Lovato took to Instagram ... than I have in my entire life.” Lovato continued: “Long before I had an engagement ring on my ring finger, I had the word ‘me’ [tattooed on it] to remind ...