Keith, or Leigh Francis as his mum likes to call him, dressed up as Gary Oldman's version of Dracula as he was joined by a whole host of celeb chums for the fancy dress bash at London's Gilgamesh restaurant.
Keith Lemon aka Leigh Francis arrives for his 40th birthday bash
We barely recognised Jodie Marsh who squeezed into a catsuit and had her face painted blue to go as Na'vi from Avatar, which was a far cry from the model-turned-bodybuilder's usual scantily clad look.
And it sounds like Jodie had a great night, later tweeting: "Night night folks. That was officially the best night of my life :-) in bed with my Kindle now #rocknroll. Hope you liked the pics #avatar xx."
New mum Fearne Cotton got the night off from looking after her two month old baby son, Rex. The DJ looked good enough to eat in her cupcake outfit and was reunited with her fellow 'Celeb Juice' captain and bezzie, Holly Willoughby inside the bash.
Meanwhile, Geri Halliwell went as a Bavarian milk maid (we think) while her fellow Spice GirlsMel C and Emma Bunton dusted down some of their old stage costumes to come as their alter egos Sporty and Baby.
See more pics from the bash in our gallery below...