Happy Birthday to Brad, Katie & Christina!

The Hollywood Gossip would like to wish a very happy birthday to a trio of stars on this 18th of December: Brad Pitt, Katie Holmes and Christina Aguilera!

Brad Pitt was born in Shawnee, Oklamoma, back in 1963, while Katie Holmes came into this cruel world in Toledo, Ohio, in 1978, and Christina Aguilera was welcomed by her Staten Island, N.Y., parents on this day in 1980.

These three beautiful celebrities have enjoyed enormous success in the arenas of movies, TV and music, but in the past year, each has become known as much for their role as parents - or parents-to-be - as for their respective careers!

Katie Holmes gave birth to daughter Suri Cruise in 2006, while Aguilera and her husband, Jordan Bratman (pictured), will welcome their first child in January.

Which a biological daughter in Shiloh and three adopted youngsters in Pax Thien, Maddox and Zahara, the Brangelina Brood is a formidable one.

Happy birthday to Katie, X-tina and Brad! We know the latter won't don his birthday suit on film anymore, but Angelina Jolie will be seein' Brad Pitt nude tonight!