Where did that come from?

We have some good friends that live close by that have a pool and have given us permission to use it anytime we please. I decided today that we would go to the pool and I was telling Emma that we were going to go to the pool today. She looks at me with a incredulous look on her face and with a sassy/sarcastic attitude she says " Shut up." I laughed so hard. Where did she learn this? We get over to the pool and they have this huge macaw that is in an outdoor cage and it likes to call for their son. So here is the conversation between Emma and the bird. Stitch: ADAM, ADAM. Emma: Adams not here. Stitch: WHAT. Emma repeats herself. Stitch replies again: WHAT. Emma: I'm Emma Grace. Stitch: WHAT. Emma: Don't talk to me like that. This conversation repeats itself multiple times over an hour. Finally it sounded like the bird said Emma Grace. So cute. Emma never ceases to amaze me. I'm not sure where she comes up with half the things she says. She some days sounds like a mini me bossing everyone around. Kids certainly do have way of letting you know your flaws without meaning to.