Jessica Alba wasn't the only one throwing a party this weekend! Christina Aguilera celebrated her 28th birthday (which was actually on December 18th) with a bash inspired by the British cult classic A Clockwork Orange. The pop star and her hubby Jordan Bratman went over the top for the festivities, wearing all white clothes, black felt hats, canes and painted-on eyelashes, just like the movie's mistanthropic leading man.