Justin Bieber, James Blunt cover Lady GaGa

Justin Bieber and James Blunt gave their interpretations of Lady GaGa's new track during an appearance on The Ellen DeGeneres Show.

The pair were enlisted by DeGeneres for a joke segment on Wednesday's show to help her predict what GaGa's unreleased song 'Born This Way' will sound like.

"The lyrics have been released but no-one knows what the song sounds like," she explained to her audience. "I thought I should just take a shot at what it will sound like."

DeGeneres - wearing a GaGa-inspired hat contraption made from toys - began the segment with her own piano-based interpretation of the track before asking Blunt to join her on stage.

However, she appeared unconvinced by his guitar-based rendition, pointing out that it sounded very like his hit track 'You're Beautiful', and decided instead to enlist of help of Bieber. The teenager kicked off his performance with a drum-based, rock interpretation before taking to his keyboard for a more melodic version.

GaGa will perform the real track during this weekend's Grammy Awards, which airs on February 13 from 8/7c on CBS.