Los Angeles: Singer Jessica Simpson who is expecting her first child with fiancé Eric Johnson this month is busy writing songs for her baby.

"She talks to the baby and already feels like she knows her. She sings to her all the time, too. What's really sweet is that the baby already has songs written especially for her," a daily quoted a source as saying.

"Jessica is going to be the most unbelievable mother - she's taken to it like a duck to water," the source added.