Slow to smooth
Well it starts out feeling pretty slow but it starts to turn up and get a lot better I think which is pretty cool to me since it seems to feel like it would make a good music video. I can just picture Pinkie Pie laughing with this one as well. And right as I wrote that I hear Pinkie say "This is my jam", you read my mind there, heh.
The drums are cool and the kicking pattern seems a bit random at times but still very nice on the ears I think too. The synth sounds really happy and like it would help you to laugh and just be very happy. When it is just the synth I can see Pinkie having her voice edited from when they were in the forest to make it seem like she is going up in pitch to make a synth sound, hilarious.
The icy sounding synth later in the song is very happy feeling and I like it too. It then changes up to pure dancing as Pinkie wants everyone to feel happy enough to party with her and just have a good time which is great for the party mood.
Overall, very happy piece of work, I like it.