She really seems like an odd one out. The skin looks nothing like her (I consistently mistake it for Irelia), and considering the backsteps and weird apologies for her design being sexualised earlier this year it doesn't seem to make much sense to go on to style her like some K-Pop girl. What gives?
I think the singers pick the champions they wante the skins, thats why we got a second Ahri skin about pop star thematic.
I have nothing against sexualized or attractive champions, but for me Kai'sa was an absolute disapointment in term of thematic and chara-design.
We could have had a badass woman, struggling to see the difference between reality and the horrors she saw in the caves. A mentally challenged kind of person, a paranoid veteran if you want.
I find the result of this champion completely boring, she lacks serious peronnality and originality it just seems she was just made for the sake of having another pretty face to sell more skins indeed.
If we look at the other champions we had recently, most of them struggled to come with another skin and that's the case for : 
We all made the mistake to think she was irelia, but we all forgot irelia got a skin recently of the spirit blade line. Who knows she might get rookie’s skin from worlds
When Riot designed Kai'Sa, they made her all sexy with v-neck and butt and lipstick and hairdresser's hairdo and a catsuit that doesn't look like a Void monstrosity but the latest in fashion.
The reason they did that, is to sell sexy skins for her, just like this pop singer skin. It's easy to make a sexy skin for a character when the base design is already sexy.
When Riot released Kai'Sa, they were already planning skins like this K/D/A one. In fact, I say Kai'Sa was DESIGNED to sell sexy skins.
Which is why it pisses me off when they outright lied with "whooops we didn't realize we made her too sexualized".
