I have a purple face budgie? Is it rare?!?

People are saying theres no such thing but i have one. I have never seen one before out of all the 1,000' s of parakeets i saw and owned. My parakeet is green, yellow face ,white dots and black dots on wings. But she has purple cheeks. Also its not a dot of purple its a chunk. I sware its purple, my friends and parents even say it is! Is it rare ( for a parakeet to have purple cheeks)?? Please tell me!!