Gwen Stefani has been closely monitoring fellow pregnant stars Angelina Jolie, Jessica Alba, and Halle Berry - so she can share the experience of other A-list moms-to-be.

The singer has been snapping up celebrity magazines each week, to keep up to date with the latest baby gossip, and learn how a pregnant star is meant to behave.

She says, "I’ve got caught up in the whole celebrity pregnancy thing."