Fall Out Boy bassist Pete Wentz has been preparing for fatherhood with the help of rocker pal and new dad Joel Madden.

Madden and his girlfriend Nicole Richie became parents to daughter Harlow Kate Winter Madden earlier this year, and Wentz's wife Ashlee Simpson is currently expecting their first child together.

And Wentz, who has turned to his own father and parenting books for tips, admits he has also been talking to the Good Charlotte star so he knows more about what to expect.

He tells People.com, "Joel gives me advice. (It's) been really awesome for me to go to another person my age."

And Wentz already practices serenading the baby.

He says, "(I sing to the baby) late at night... Baby's gotten a couple lullabies."