Never off duty! Simon Cowell celebrates his 55th birthday at the X Factor house with Sinitta and this year's contestants...before leaving with huge gift
He is a hardworking music svengali - and, to prove it, Simon Cowell spent his 55th birthday at his version of the office: the X Factor house.
The father-of-one, who was seen entering the London property alone, looked relaxed as he acknowledged onlookers and fans on his big day.
There, he was joined by close friend and colleague Sinitta, who was clearly in the party spirit - smiling and waving at photographers.
Wearing his signature look of stonewash denim and a white T-shirt, the pop mogul - who manages One Direction - was clutching a dossier of papers and an energy drink.
He also sported a pair of aviator sunglasses for added cool.
Although the festivities seemed low-key, at one point a large gift was hand-delivered by an insider - which was later packed into the boot of Cowell's car.