Can alicorns live forver?

My answer is a Eeyup and a Nnope. Because you see in the Magical Mystery Cure, Twilight is made or destinied  to be an Alicorn Princess. I also believe that alicorns can die because of old age. I also belive that alicorns cannot die, if they are assasinated, as nesessary. As a explanation for my answer Eeyup, I have a theory that if alicorns are assasinated, they can die if there are no quick remedies. For my answer Nnope, I believe that alicorns can die of a life span of........... Hmmmmm......... 1,000,000 years or something. Thats all. Bye.