Ashlee Simpson having a boy?

Ashlee Simpson is reportedly expecting a baby boy.

The 'Pieces of Me' singer - who married Fall Out Boy rocker Pete Wentz in a secret ceremony in May - has listed her baby requirements on a gift register at exclusive Los Angeles baby boutique Petit Tresor, and they seem to be for a boy.

A source said: "Almost everything is blue. They made it very clear that it was a boy."

When the couple visited the store, they bought a selection of T-shirts and bibs from the Plain Mary collection with the words, 'Hunk', 'Loved' and 'Yummy' emblazoned on the front.

Ashlee and Pete are set to visit the baby boutique again next week to discuss the nursery.

Pete recently revealed he is keen to find out the sex of his baby.

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!"

However, the 29-year-old musician hinted he and Ashlee were expecting twins after referring to his unborn baby as "them".

He said: "We've been keeping a book so far, like a journal for them - for them when they're, uh, born."

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