She styles Simon Cowell's artists on American Idol and is said to share a "unique friendship" with him.
And after Mezhgan Hussainy flew in to the UK for the music mogul's 50th birthday party, there's been speculation he is falling for the Afghanistan-born beauty.
Thirty-six-year-old beauty Mezhgan - who has also acted on US soaps Sunset Beach and The Bold And The Beautiful - is understood to have grown close to Simon while working with him on a makeover for Scottish singing sensation Susan Boyle.
And denials that they're dating haven't stopped the rumour mill.
The X Factor judge's rep recently said: "Simon's friendship with her is purely platonic. They are not romantically involved".
But friends emphasised that the pair share the same sense of humour and have been meeting for lunches and dinners together.