Just three months after giving birth to her first child, Fergie wore a fitted yellow Ungaro dress and Christian Louboutin shoes for her date night with Duhamel.
Sarah Michelle Gellar, Kathy Griffin, Lisa Kudrow, the Glee cast and others also turned out to support The Trevor Project, which offers crisis intervention and suicide prevention services to LGBT youth.
Fergie said earlier this week that she's open to having another baby.
"Of course, that would be amazing," she said, but added that she's still concentrating on her son.
"I'm still figuring out how to balance it all. ...But I think that's something all new moms can relate to," she said.