The platinum blonde No Doubt singer was spotted out and about in sunny Los Angeles on Thursday (5 September), wearing an oversize black sleeveless T-shirt and slouchy black trousers.
Gwen sported her usual red lippie, and even painted her nails to match, showing off her chic pedi in a pair of killer peep-toe heels.
Speculation of a pregnancy was sparked on Wednesday (4 September) after a source claimed to a US publication that the singer is expecting again.
There's been no confirmation from Gwen or husband Gavin, though.
The 43-year-old singer is already mother to seven-year-old Kingston, and five-year-old Zuma, as well as being step-mother to Gavin's model daughter, Daisy Lowe, from a previous relationship.