Pentatonix perform spine-chilling a cappella cover of Lady Gaga and Bradley Cooper's 'Shallow'

Three-time Grammy Award-winning group Pentatonix has just dropped a powerful a cappella cover of Lady Gaga and Bradley Cooper's popular song 'Shallow' - and it is achingly beautiful.

Putting their signature spin on the A Star Is Born hit, Kevin Olusola can be seen playing the cello while Scott Hoying takes on Cooper's part.

Kirstin Maldonado accepted the challenge of Gaga’s solo and of course, completely nails it.

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The supergroup continues to build the song up, singing in perfect harmony.

"We've LOVED singing this one on our world tour so much that we decided to film a new music video for it," the group said on Twitter of the track.

And fans are thrilled with their rendition of the song, praising the group for their flawless efforts.