EDIT: Ok, I'm going to explain this. This is NOT the scene from the song, but one I invented just for fun, taking the sentence as a reference. So, Pinkie Pie doesn't have to wear AJ cutie mark. I wanted to make it clear with Pinkie wearing AJ's hat.
I have to admit, I love that song. Also, when Applejack is carrying Pinkie Pie to the town is cute to no end.
I'm not only terror and gore, you know...
This is not vector, I made it with pencil and paper, scan it and ink and color it in Sai.