Love YY. The construction of the song is super simple. Love how parts of the song start to get layered on top of each other towards the end of the song, which makes it not super basic. I dig the R&B / EDM fusion. It's really groovy. I could drive into the city at night listening to it. I've been listening to it non-stop.
The dance is super simple but stylish. MV is really colorful, but nothing feels outta place. I do wish some of the hairstyles were a little less loli-con, but all the girls look good regardless.
Simple, dynamic, and cool. 10/10 song for me.