I'm not surprised at how often I see this requested. (I was thinking it too.) But I'm fairly attached to the idea of Pinkie Pie and don't want to corrupt it. So I generally don't draw that much of my own type of thoughts with her.
That said, if anypony wants to go nuts with Pinkie Pie and balloons everywhere? Go nuts. I'm all for it, and will probably be right along clicking curiously. :O
Also this image was a more specific request than Pinkie with balloons, so that's kinda cool.



... I'll get around to making a new video comparing the new balloon models in Season 2 to the ones from Season 1 eventually. I'm not totally sure why the sudden shift in detail. Made stranger by the fact that the older models do show up in the same scene in very small quantities. Sometimes really close to the viewer's perspective. But whoever made the build for those models did their research on real world feasible balloons this time. Or maybe that's just because those weren't Pinkie's balloons, and Pinkie tends to break the fourth wall and abuse physics all the time anyway?