Hollywood's Sweetest Family #Ussies

From Gwen Stefani to Hilary Duff, see which stars are having fun snapping pics with their adorable tots

Credit: Courtesy Gwen Stefani

Updated: Monday Sep 15, 2014 | 06:00 AM EDT By: Karen J. Quan

GWEN STEFANI

He's one well-traveled baby! During a family trip in Europe, Stefani introduces 5-month-old son Apollo to the important sites of Switzerland – namely, a Swiss cow!