These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: My Little Pony: Friendship Is Magic S2 E12 "Baby Cakes"
Also, Pinkie's "pig song" bears more than a small resemblance to the Chicken Dance.
Tear Jerker: Oh god.....Pinkie Pie's crying may be over the top most of the time, but her crying in this episode is particularly emotional and this time played for drama.
Tastes Like Diabetes: A majority (if not all) of the episode can be considered this, with the only notable exception being the Adult Fear moment when Pinkie loses the babies. Leavened by the humor factor involved in Pinkie's existence.
The show's crew has confirmed that the pig song is a spoof of other kids shows' tendencies that they consider themselves above.