Their trio is close to becoming a foursome, and Gwen Stefani, Gavin Rossdale, and son Kingston are making the most of their time before the new baby is born.

The “Wind it Up” songstress and her “Love Remains the Same” singer hubby took their 2-year-old on an awesome shopping spree at Hamleys Toy Store in London, England.

And Stefani looked very, very pregnant in a black maternity dress overtop a pair of black pants topped off with a pair of black flip-flops.

The day before, Kingston and Co. were spotted at the World Famous London Zoo enjoying an afternoon of beautiful summertime weather. They were also joined by tennis legend (and Wimbledon competitor) Roger Federer.

Gavin recently told press that his wife is intensely focused on getting back in shape just as soon as the baby is born. “Yeah, she does (feel under pressure). I mean, she’s just so dedicated and she’s just amazing with that stuff (weight loss). It’s very hard because everyone’s so judged the whole time.”

Gossip Girls

Enjoy the pictures of Gwen Stefani and family out toy shopping (June 25), and at the zoo with Roger Federer the day before.

Photo Credit: BauerGriffin.com, PacificCoastNewsOnline.com