International pop sensation PSY has publicly shamed a lookalike who has allegedly been impersonating the rapper at the Cannes Film Festival.

This week, the Gangnam Style singer was said to have been spotted at a series of glitzy parties in Cannes, posing with fellow celebrities and walking red carpets, however Psy has now confirmed he is currently thousands of miles away in Singapore.

The South Korean pop star reveals his manager, Scooter Braun, spotted the fake Psy and insists festival organizers have been duped by a lookalike.

He writes on, "Seems like there's another ME at Cannes... say Hi to him Scooter Braun LOL (laugh out loud). Psy in Singapore."

PSY goes on to upload a photograph of the imposter, adding, "Here the picture of fake Psy in Cannes spotted by Scooter Braun!!... Real Psy in Singapore."