At the very beginning of the movie when we first see Sally Field rushing around the house preparing for Julia Roberts' wedding, her sons come up and put ice down the back of her shirt then run out the door. If you watch and listen carefully you can see the ice cube fall out and hear it hit the floor. So apparently the ice is no longer down her shirt, but Sally Field continues to dance around and act like she's trying to get it out, then she asks Julia Roberts to get it out. Maybe there was more than one piece of ice, but I still think this was a slipup...