Gwen teamed her signature platinum blonde locks and red lipstick with a tight, all-black ensemble and stiletto heels.
The No Doubt front-woman shared the pic on her Twitter profile with the caption: ‘bump it #allblack #inappropriateshoes #capturethemoment #miracle.’
Gwen told fans she was expecting a boy via her Instagram page.
The singer and fashion designer has not yet revealed the due date of her new addition, but announced to fans that she is expecting a son.
44-year-old Gwen only recently joined Instagram, and her first post held the caption: ‘I was ready to hand over the crown. but I guess I am still queen of the house. #itsaboy #surroundedbyboys.’
Gwen tweeted the pic of her bump, teaming her outfit with 'inappropriate shoes.'
The quirky star is already mum to 8-year-old Kingston and 5-year-old Zuma with husband, British rock singer Gavin Rossdale.
The new baby will be a brother for Kingson and Zuma (pictured).
It had been widely reported that the singer was expecting her third child before she revealed her growing baby bump.
We wonder what names the trendy couple have picked out for their new arrival?