By Alanah Eriksen
She arrived wearing a mask of the birthday boys face.
But it wasn't hard to tell who the buxom brunette was behind the cardboard cut-out.
Tulisa Contostavlos turned up hiding her heavily made-up face with a picture of celebrity agent Jonathan Shalit.
Tulisa arrived at celebrity agent Jonathan Shalit's 50th birthday hiding behind a mask of his face, before showing off her figure in a tight dress
But if wasn't long to she revealed all - shedding the large picture to reveal plenty of cleavage in a sparkly keyhole silver dress.
The number featured a floaty skirt and she paired it with black heels and a black clutch.
What a good sport! The birthday boy laughs off the joke
Dressing up: Tulisa's dress featured a cut-out panel at the front and a floaty chiffon skirt
Old friends: Jonathan was the manager of Tulisa's now-defunct band, N-Dubz
She posed next to Jonathan, who was a good sport, laughing at the joke.
The X Factor judge turned up with her assistant Gareth Varey, who accompanies her to most events.
But there was no sign of her new boyfriend, Skins actor Jack O'Connell.
Jonathan was the manager of Tulisa's now-defunct band, N-Dubz, for several years and went on to represent her when she went solo.
Her entourage: Tulisa arrived with her assistant Gareth Varey for the bash
Putting her troubles behind her: The X Factor judge certainly wasn't short of male attention
The star joined several celebrities at the party, including Kelly Brook, Myleene Klass, Jade Ewen, Lorraine Kelly, Konnie Huq, Jackie St Claire and Kate Garraway.
Tulisa appears to be well and truly trying to put her troubles behind her.
She had had a rough few weeks after her sex tape with an ex-boyfriend was revealed and she fell out with cousin and former bandmate Dappy.
Huff and puff: Jonathan and wife Katrina blowing out the candles on his cake