Rory: You look happy.
Lorelai: I am, kid.
Rory: Did you do something slutty?
Lorelai: I'm not that happy.
In the scene where Lorelei and Rory are sitting at a table, with Rory looking at herself in a mirror, they talk about Rory's hair. Right after this, Rory asks, "do you want something to drink?" Her mouth doesn't move at all.