Jimmy Fallon's in-house barbershop quartet The Ragtime Gals are known for adding an old-timey twist to modern day sex jams, covering songs like R. Kelly's 'Ignition' and Justin Timberlake's 'Sexy Back'. 

Overnight, they added Joseph Gordon-Levitt to the group, for what we're going to go ahead and call a stirring rendition of Rihanna's 'Bitch Better Have My Money.'

"Blap blap blap", the group sang in flawless harmony, as old mate Gordon-Levitt won the audience over with his mugging and his very specific gesturing. 

It's the second-most bizarre musical enterprise he has been involved in this year, after that music video celebrating his love of MILFs (#NeverForget). Enjoy: