Heidi Klum and daughter Leni Jon Stewart and son Nathan

Heidi Klum and 2-year-old daughter Leni visit the Stuart Weitzman boutique in Beverly Hills on Friday.

Jon Stewart and 2-year-old son Nathan enjoy a father-son stroll through the Big Apple on Sunday.

David Arquette and daughter Coco Jennifer Garner and Violet

David Arquette and daughter Coco enjoy the San Antonio Spurs and Los Angeles Lakers basketball game at the Staples Center in Los Angeles on Sunday.

Jennifer Garner plays a game of peek-a-boo with 1-year-old daughter Violet during a day out in Santa Monica.

Sean  Gwen Stefani and Gavin Rosssdale and Kingston

Sean "Diddy" Combs and girlfriend Kim Porter have introduced their twins, D'Lila Star and Jessie James, on the cover of Hello! Canada.

Gwen Stefani and Gavin Rosssdale out with 8-month-old Kingstonin London on Tuesday.

Mariska Hargitay and 7-month-old son August . Kate Winslet and Joe

Mariska Hargitay and 7-month-old son August head out of Los Angeles International Airport on Monday.
Kate Winslet and her  3-year-old Joe, through the busy New York City streets on Thursday.