When Miley Cyrus and Ariana Grande covered a popular song from the 80s, they probably didn't expect to get a stamp of approval from the original performer.

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On Friday, Billboard reported that Neil Finn approved of the 21st century popstars' cover of his classic Don't Dream It's Over.

The two are seen performing the song while donning footie pajamas in a video that quickly circulated online. It's reportedly part of Cyrus' Backyard Sessions that aims to raise awareness for her Happy Hippie Foundation which aids homeless and LGBT youth.

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"What a life that song has had," Finn said. "I'm happy to see them enjoying it so much and hope it inspires some donations to a good cause."

The song was originally released by Finn and his bandmates in 1986. It went on to reach the top 10 across charts in America and Europe the following year. It even hit top 10 in Finn's native country, New Zealand.

'To launch The Happy Hippie Foundation, Miley created a new Backyard Sessions series and invited special musical guests to perform with her to make these music video collaborations,' read a caption on the Youtube video.

The video is nearly four minutes long and shows the stars sitting on a blow-up couch as they belted out the song in their pajamas.

It has also received more than 510,000 views in only a few days of being online. Watch the full video below.