D.E.
Hi K.,
I might suggest that you see how you are responding to her screams. Don't get this or do that when she uses it to demand her way. I'm guessing she'a a beautiful, bright little thing that is discovering how to make things work. Let her know you aren't going to allow her to control the room with a screaming tantrum (watch the friends/invites begin to lessen if you don't) and lovingly teach her it isn't allowed. Speak to her directly because she DOES understand your language at this age and knows what you're saying. Be diligent because good discipline pays off! In a practical way, you could sit her in the high chair for a time out, sit her in your lap and be lovingly firm while at the same time not ignoring her, etc. She wants to be the center of attention because she is HUMAN and it's the normal cry most of us pull even as adults (we're just more creative:) Pray God's wisdom gives you some new insight on how to best use her little personality to be strong but obedient...it starts so early.
God bless you in the huge task of gracious parenting!