U.S. version of Cortana gets 6 new animations, Chinese version grabs 24
The new animations in China include expressions like "Ashamed" or certain activities like "Bounce". They are employed whenever Cortana is telling a joke, or saying a trigger phrase (similar to Android users saying "Ok, Google" to get Google Now up and awaiting your inquiry).
Six new animations have been added to the U.S. version of Cortana, and some can be used when you ask Cortana to do an impression. Many of the U.S. animations contain pop culture references such as a magic wand for Harry Potter, an outline of Jedi Master Yoda for Star Wars, and the minions from Despicable Me.
source: Livesino.net via WPCentral