Which came first?!?!?!?

OK. So which came first...the egg or the chicken? My friends thinks it's the egg and some thinks it's the chicken. My friend Connie(or was it Beatrice?)thinks 2 animals just breed and then got a chicken... Anyway, which came first, the egg or the chicken?!?!?!? U think about it... EGG OR CHICKEN? u pick... LOL! Have fun picking!