After a spate of baby girls (Shiloh, Suri, Isabella Damon etc) during the last Hollywood baby boom last year, it looks like the next boom will be all blue: gifts at Nicole Richie’s baby shower at the weekend suggest that the socialite going to be joining Christina Aguilera in having a son.

Around 90 guests attended the Wizard of Oz-themed event in Beverly Hills on Saturday and picked items from Nicole and boyfriend Joel Madden’s registry at NoMi baby boutique in Los Angeles.

Gifts included a $50 pair of boy’s shoes and a $50 Tummy T Jack maternity shirt with a picture of a boy on the front.

A source close to the couple added: “They’re so excited. They can’t wait to meet their little baby.”

The baby, a first for both Nicole and the Good Charlotte star, is due in January.