In the episode Imeet Sam's Mom, when Sam get's mad at her mom and runs away to Carly's house, she accidenally wakes Carly up. Carly has a little bed-head going. Well, a few scenes later, her hair is nice and neat. Then, it goes back to messy and unkemp. Then, when Spencer comes in the room, her hair is nice and brushed again. THEN, it's messy.