Miley Cyrus And Ariana Grande Teamed Up For A Flirty Duet

For charity!

Miley Cyrus' latest "Backyard Session" is a killer cover of Crowded House's "Don't Dream It's Over," featuring Ariana Grande.

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Miley put together the video series to benefit her newly launched The Happy Hippie Foundation, which supports homeless and LGBT youth.

And, yes, they're in onesies!

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In between nailing some amazing harmonies...

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Miley found time to flirt with Ariana.

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And Ariana flirted right back.

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The love-fest proved to be a bit distracting, though — Miley and Ariana missed their next cue.

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And Miley called it like it was...

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Then flirted some more.

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Watch the full, flirty duet here.

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And you can donate to The Happy Hippie Foundation here.

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According to the foundation's Facebook page, "Every $15 [donated] provides one LGBT youth with digital support groups for a year, so that they can access critical resources, help, and community no matter where they live."