Each character has multiple fatalities that they can perform at the end of the match when you beat them in Mortal Kombat 9 (2011 version) for the PS3 and Xbox 360.
This is the list of all finishers (two fatalities, one babality, and one stage fatality) for Kitana.
These can be unlocked and added to your moves list by performing them in either Arcade Mode or Versus Mode.
Check out these complete fatality guides for more finishing moves:
Fatalities and babalities for Mortal Kombat on PS3
Fatalities and babalities for Mortal Kombat on Xbox 360
Kitana’s Fatalities & Finishing Moves
Xbox 360
Fan Opener — Down, Down, Back, Forward, Y when close to your opponent
Splitting Headache — Forward, Down, Forward, Back, A when in sweeping distance
Babality — Forward, Down, Forward, B in jumping distance
Stage Fatality — Forward, Down, Down, A at close range
PS3
Fan Opener — Down, Down, Back, Forward, Triangle when close to your opponent
Splitting Headache — Forward, Down, Forward, Back, X when in sweeping distance
Babality — Forward, Down, Forward, Circle in jumping distance
Stage Fatality — Forward, Down, Down, X at close range
