The glamour model made no attempt to conceal her bare wedding finger as she promoted her new perfume Precious Love.
According to the Sun The mum of three looked rather gloomy for much of the promo.
Rumours have been rife recently as to the state of her marriage to Alex Reid, which is not yet a year old.
Katie was seen having reverted back to her bleached blonde look when she was pictured with boxer Amir Khan in America last week while hubby Alex was rumoured to be looking cosy with Amelle Berrabah of the Sugarbabes as well as turning on the charm with other ladies at two showbiz events in his wife’s absence.
It is suspected the stress of two failed IVF attempts has driven a wedge between the couple and there have been reports that Alex has moved in with his mother.
Cage fighter Alex has announced he intends to pen a tell all book and it is thought he will disclose details of his marriage to Katie.