It's Justin Bieber's "Beauty and a Beat" as you've never heard it before!
The song was arranged by Steve Pycroft and performed by tenor Robin Blaze, the University of York Baroque Orchestra and Chamber Choir and conductor Peter Seymour on Friday March 15.
The performance was filmed and broadcast on BBC Radio 3 for Red Nose Day.
There's something a little weird about hearing an amazing opera performer sing the words "girl, I wanna feel your body rock", isn't there?
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