A fake Psy has reared his head again - this time at the Monaco Grand Prix.

As previously reported, an imposter duped the stars recently at the Cannes Film Festival as they got their photo taken with the lookalike.

The real Psy later called out the impersonator on Twitter, confirming that he was actually in Singapore.

However, the fake Psy was seen at the Monaco Grand Prix on Sunday (May 26) - but it seems the celebrities had wised up to his act.

David Hasselhoff posted online an image of himself with the 'singer', along with the caption: "Was that really PSY ? I think not!!"

He was also pictured with Britain's Got Talent judge Amanda Holden.

The imposter - real name Denis Carre - recently told Channel 5 News about his Cannes adventure: "The game was pretty well played – we prepared a lot with my manager and communication team on how we were going to do that. We had the bodyguards, we had the cars, we had event managers ready for it...just to have the illusion."