I'm no hater of vocal remixes, but I'll admit that when I come across one, I often click "play" and expect that I'm not going to like it.
And then I was pleasantly surprised by this today. It's upbeat, happy, has a bit of melancholy in the story the lyrics tell, and it's catchy, the more times you listen to it. As people have already said, this song has a "summery" feel to it. Perfect for me to listen to while the air is freezing, and I am surrounded by mounds of snow. (Ha. Good times.)
Shido - Starts out silly and fun, although the detuning somewhat overstays its welcome. Then you take it in this awesome new direction. However the detuning reappears along with some dissonant chords, IMO to the track's detriment.
Silverpool - Appropriate track title I'm not familiar enough with the source to tell if you added anything bit it sounds alright. Would have liked to hear the lead synths sound a little deeper and more pleasing to the ear though.
hoboka - Liked the parts you added. Would have liked a little more of that. The tempo shifts were a good idea too but I think you took them a little too far. Nevertheless this stands out to me as the best of the three tracks.