Simon Cowell's longtime friend Sinitta is set to miss the music mogul's upcoming wedding to Lauren Silverman. Singer Sinitta, 58, was Simon's first signing as s record company executive back in 1986 and the pair had an on-off romance for 20 years after they first met in 1983. And, while they remain good friends today, Sinitta will not be present when he says 'I do' to American socialite Lauren, 44 - because she will be on tour as Matron Mama Morton with the musical Chicago.