To answer this question, we need to be familiar with the nicknames of Diego Milito.
Option A) LA PELUSA - This option is incorrect. "La Pelusa" is the nickname of Diego Maradona, not Diego Milito.
Option B) EL JEFECITO - This option is incorrect. "El Jefecito" is the nickname of Javier Mascherano, not Diego Milito.
Option C) LA PULGA - This option is incorrect. "La Pulga" is the nickname of Lionel Messi, not Diego Milito.
Option D) EL PRINCIPE - This option is correct. "El Principe" is the nickname of Diego Milito. He is commonly referred to as "El Principe" due to his elegance and skill on the football field.
Therefore, the correct answer is D) EL PRINCIPE.