Just 4 gigglez... Also IF YOU DON'T GET IT READ BELOW.

If you don't get it the joke is that Twilight doesn't know what the Doozy is and she goes on EqD and sees that Season 3 only has 13 episodes and she's like oh, yeah, right. That's the doozy. Ya see??

Used in this Video:
www.EquestriaDaily.com
Clips from My Little Pony Friendship is Magic
Some other stuff