Simon CowellAlthough 'American Idol' judge Simon Cowell joked on 'The Tonight Show' recently about getting married sometime "in the next 10 years," it seems the wedding is going to be much sooner. 'Idol' stylist Miles Siggins told Fancast.com that Cowell and his girlfriend Mezghan Hussainy are planning to wed in September. "I was kind of surprised," said Siggins. "I knew they were dating, but I was surprised that they got engaged [so quickly]."