Are you sure the Animation pack is missing or can you just not locate them? First off, make sure you purchased the pack for the right gender you plan on using them with - they are gender-specific. Then press START and find your INVENTORY (i.e.: Same place as your Bubble Machine and Companions).
There, you should see the item. Click (X) on that to Activate it and if the space is already fully loaded, you should see the new animations listed at the very bottom of your Emotes list.
If not, and the content purchased isn't showing up, reply and say so. Joystick_Warrior could investigate the issue if needed. Good luck!