On Twitter, the pair teased a "wavy" new song they wrote together--no confirmation on whether it's the one that Lovato had stuck in her head last week.

"Wrote a song with @Miguel today," Demi tweeted. "I'm so excited to hear it with the track!!! Miguel, you are the [poop emoji]!!" Miguel responded in kind with a simple "such a great wave." Read more - here.

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