"Extra's" Mario Lopez and girlfriend Courtney Mazza welcomed their first child, Gia Francesa on September 11 this year -- and Alicia Keys and hubby Swizz Beatz welcomed a son, Egypt Dean, in October.
Check out what other celebs added to their family's in 2010.
Mario Lopez and Courtney Mazza
"Extra's" Mario Lopez and girlfriend Courtney Mazza welcomed a healthy baby girl, Gia Francesca Lopez, weighing in at 6 lbs, 4 oz, on Saturday, Sept. 11 in Burbank, CA.
Kelly Preston and John Travolta
Kelly Preston and John Travolta welcomed their third child, son Benjamin, weighing 8 lbs,, 3 oz. in November at a hospital in Florida.
Actor Matt Damon and his wife Luciana welcomed a baby girl, Stella Zavala Damon, in Ocotber in New York.
Celine Dion and Rene Angelil
Singer Celine Dion gave birth to fraternal twin boys in October at St. Mary's Medical Center in West Palm Beach, Fla.
Alicia Keys and Swizz Beatz
Singer Alicia Keys and hubby Swizz Beatz welcomed a son, Egypt Dean, in October.
Robin Thicke and Paula Patton
The happy couple welcomed their first child, Julian Fuego, in April in Los Angeles.
Will Arnett and Amy Poehler
Emmy-nominated actress Amy Poehler and her husband Will Arnett welcomed their second child, a baby boy, Abel James Arnett, in August.
Actor Kevin Costner and his wife, Christine Baumgarter, welcomed their third child, a baby girl named Grace Avery Costner, in June.
Amy Adams and fiance Darren Le Gallo, welcomed a baby girl, Aviana Olea Le Gallo in May.
Supermodel Claudia Schiffer and her husband, British film producer and director Matthew Vaughn, welcomed a baby girl in June.
Singer and former "Extra" host Mark McGrath and fiancee Carin Kingsland welcomed twins in April.
Actress Amanda Peet delivered a healthy baby girl in April. It's her second child with screenwriter husband David Benioff.
Rebecca Gayheart and Eric Dane
Rebecca Gayheart and her McSteamy hubby Eric Dane welcomed a baby girl in March.
Keyshia Cole became a new mother in March, when she gave birth to a baby boy, her first with Cleveland Cavaliers hubby Daniel Gibson.
Christina Milian and The Dream
The singer gave birth to her first child in February, a girl. The father is Grammy-winning music producer The-Dream, aka Terius Hagert Youngdell Nash.
Matthew McConaughey and Camila Alves
McConaughey and girlfriend Camila Alves welcomed their first daughter, Vida Alves McConaughey in January. The actor and Alves are already parents to son Levi.
