Yelling didn't work with my DD it eventually turned into a game because she was getting a reaction out of us so by ignoring it she soon grew bored of it.

If its out of excitement maybe try change what her reaction is, for my DD we clap our hands and say "yay" when we are excited. So if she sees you get excited along with her and you clap she might pick up on that.

Its so hard coming up with solutions when we dont see it first hand.