Party Cannon Plot

Before I talk about what this is lol, lemme point out a MAJOR annoyance I had with this...I had started Pinkie Pie on monday, and had made the BEST vexel lineart I've ever made....and then GIMP froze...and it was entirely lost...I was very sad....working on this today, it was clear I'd never be able to duplicate it. :/

Anyway, this is for my friend . He's an awesome musician and I really love his music, so I was happy to help him out with this possible album cover for his song (once I realized he had changed his name lol ).
Anyway, it's based off the name of his song ([link]). We came up with the idea of fluttershy in Pinkie's Party Cannon and he came up with Pinkie standing next to it like "IDFC". Originally, she just had her hoof up but I added that rather famous shrug to it in order to ephasize the fact.

The BG: It's [was] mostly a placeholder, because I didn't ask him what he wanted. If he likes it, I'll fix it up nicer. (why is Pinkie Pie's cutiemark all yellow? The songs about Fluttershy but I decided to combine the two. Again, it's just a palceholder).
EDIT: Fixed up the BG

Sketch vexeled in GIMP
Fluttershy and Pinkie Pie belong to Hasbro.
Art belongs to me.

P.S. I don't watch MLP for the plot, this is just a drawing for a friend