Celebrities attend the launch of "Red or Black" at the Mayfair Hotel, London, UK, on the 3rd May, 2011.

Celebrities attend the launch of "Red or Black" at the Mayfair Hotel, London, UK, on the 3rd May, 2011.

Simon Cowell is reportedly thrilled about reports that his ex Sinitta has been lying about her age.

The 52-year-old music mogul used to date the singer and X Factor mentor and reportedly found it hilarious that she has been found out.

It was recently claimed that her birth certificate shows she is actually 48 rather than the 43 she has been telling people.

A source said to UK newspaper Daily Mirror: "Simon was chuckling to himself all day after discovering Sinitta's real age had been busted.

"It means people now know she wasn't 14 - and he 25 - back when they dated. He's absolutely thrilled."