She may have just been popping to the shops, but Mezhgan Hussainy doesn't do casual.

The make-up artist fiancé of Simon Cowell looked picture perfect in fitted black capri pants, a bege jumper and matching designer handbag on her shopping trip this morning.

She was joined by a young friend as she picked out supplies at Mac on Robertson Boulevard in West Hollywood.

Day out: Mezhgan was joined by a young friend as she shopped on Robertson Boulevard in West Hollywood

Mezhgan, 36, was in the audience this week as her fiancé said goodbye to American Idol.

As well as making his name in America, the show was where he met Mezhgan, who was working as a make-up artist back stage.

Cowell left after nine seasons to introduce his own show, X Factor, to the U.S.

Last week he told Oprah about his love for Mezhgan, who he is 100per cent sure is 'the one' - because she makes him a better person.

Out and about: Stylish Mezhgan always looks picture perfect

But the 50-year-old said he worries about having children with her because of his age.

He added that he enjoys spending time with children - especially over the age of five.

'I like them at that age,' he joked.

Back in Britain Cowell is set to be honoured with a Bafta for his 'outstanding contribution' to the entertainment industry.

Bafta's John Wills told the Mirror: 'Simon is quite simply one of the most brilliant producers of our time.'