Screaming Screaming SCREAMING!!!?

My little lovely 13 month old loves to scream really loud. It is extremely ear piercing. She does this when she is happy, angry, wants something, sad, etc etc.... When I say no screaming she smiles at me. This has been going on for a very long time (at least since she was 7/8 months) and I was told it would go away if I ignored it. Did not happen. I am very frustrated. Should I still just be ignoring it? Obviously she doesn't understand no because every other time my husband and I say no about something she laughs and does it again! What is a girl to do? (besides drink a bottle of red wine every night, hehe)
hey all, thanks for the answers but lets remember she is just 1 month past a year old!