The app lets anyone sing along with the stars--even if you're already a country star yourself. "How could I not?" said Bryan of the opportunity to have a little fun singing along with Derulo's smash "Want To Want Me."

The duet is not nearly as odd as one might think. Bryan hits the high notes like a champ, minus Derulos's famous falsetto which leads him to joke, "Ooo, that's filthy. I can't do that." Watch the video - here.

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