Those silly sosters are at it again!

SOURCES:

0:15 - Derpie Brothers / DerpQuest the Musical by Warlic and Thyton

My Little Pony: Friendship Is Magic Season 2, Episode 5 & 16
Link: The Faces of Evil / Zelda CD-I (0:52 & 1:23)
Nelson Muntz from The Simpsons (1:01)