The singer, who married Pete Wentz last May, registered for baby gifts at the Los Angeles boutique Petit Trésor, and all of the items seem to be for a little boy, reports FemaleFirst.
A source revealed, "Almost everything is blue. They made it very clear that it was a boy."
The two are expected to visit the boutique again next week to select items for the nursery.
Wentz previously stated that he wanted to know the sex of the baby as soon as possible. He said, "I’d like to know the sex of the baby. It would be a bummer if you bought a boy a bunch of pink stuff!"