How can i get a better six pack?

I want arm muscle on my biceps too and i have a six pack sort of but i want it more noticeable and is it bad to work out alot as i do? I do 50 crunches a day and life weights alot also and it doesnt effect your growing or anything does it? Because iwant a six pack so i'll be strong and plus all the ladies will like me so help me out