Spice Girls star Victoria Beckham has poked fun at music mogul Simon Cowell, suggesting he has no kids because he has a low sperm count.

The cheeky pop star was chatting with Cowell's TV presenter girlfriend Terri Seymour backstage at the Spice Girls show in Los Angeles on Wednesday night when she started quizzing her about the couple's plans to have children.

Seymour said, "I would like them but he doesn't," prompting Beckham to joke, "I think it's because his trousers are too high and too tight. I think it's affecting his sperm count!"

-Victoria Beckham Pictures

(This news article provided by World Entertainment News Network)