Singer Melissa Etheridge has four children: two each with exes Julie Cypher and Tammy Lynn Michaels.
Sara Gilbert, left, and producer/musician Linda Perry welcomed a baby boy on February 28, 2015. Gilbert also has two children from a previous relationship.
Country singer Chely Wright, right, and wife Lauren Blitzer-Wright welcomed twin boys in May 2013.
Celebrity chef Cat Cora, center, and wife Jennifer Cora are shown here with their four sons at the 2014 premiere of Ringling Bros. and Barnum & Bailey's "Legends" in Los Angeles.
Actress and talk show host Rosie O'Donnell is shown with three of her then-four children in 2009. (Her fifth child was born in 2013.)
Actress Jodie Foster, right, has two sons with ex Cydney Bernard. Son Christopher "Kit" Foster is shown here in 2011.
"Biggest Loser" trainer and television personality Jillian Michaels, center, partner Heidi Rhoades and their son Phoenix and daughter Lukensia attend a 2012 event in Beverly Hills.
Actress Cynthia Nixon, right, has two children with ex-boyfriend Danny Mozes and one son with wife Christine Marinoni, left.