We've been huge fans of Billy Eichner ever since his early 'Billy on the Street' days - when he spent his days accosting random members of the public on the streets of New York in his uniquely OTT manner.

Before long, the world began cottoning on to his comedic genius and big names started appearing on the show.

In recent years, Eichner has gone on to acting roles - including 'Parks and Recreation', 'American Horror Story: Cult' and the remake of 'The Lion King'.

However, if you're like us, you've probably never heard him sing - so this will come as something of a shock.

It turns out that Eichner has a pretty phenomenal voice, as he made his TV musical debut on James Corden's show last night.

His rendition of Mariah Carey's 'Miss You Most (At Christmas Time)' went down extremely well, as you'll see from the big names complimenting him below.

Prepare to be shocked...