So many great jokes in the song 

Then a funeral.  People say Rainbow Dash's roommate from the last episode died.

That's a really simple love potion recipe. I remember when I first saw the episode I had an idea for a story: Derpy crashes through a rainbow, then a cloud, stirring it with her pegasus feathers, then it rains love potion all over Ponyville. Random shipping chaos ensues. 

I'd pretty much forgotten the story of the prince and princess. Theories were flying when the episode came out.

Cheerilee looked cute in the veil and Rarity's gonna be pissed about her wall.  Not to mention the pony who's house was moved.