I realized that Japan had effectively colonized all of us, though I figured that each region of Japan-World would retain some aspects of the local culture, like how when two culture interact, both of them exchange or take aspects of each other and create I hybrid. For example, one Idol is from Old Norway, which I would think would have traditional aspects of Norwegian culture intermixed with the incoming Japanese population. I should have clarified that it wasn't literally Texas, merely the area of North America that was Texas, maybe even just the area in the Southwest U.S./North Mexico, since I'm assuming that state borders don't exist anymore. (Called something like Tekisasu, perhaps?) If the Japanese did their best to suppress previous cultures though, I think I could work with that.
I can change the dress, and even the profanity if that would be more fitting. In any musical genre there's going to be challengers to the traditional and conservative aspects of the craft, whether it's classical music or hip-hop. Rodeo is from this school of counterculture, and her style exists to go against the grain. If "Idols are wholesome performers, not raunchy", she's a challenger in (at least attempting) an emulation of people like Elvis, The Beatles, etc., were are beloved and staples now and a part of "proper" culture, but at the time were viewed as obscene and inappropriate. Then again, if the galactic culture functions under the reign of some sort of censoring authoritarian government, that's also interesting. Do they work to make sure that no Idols outside of the norm can thrive? Or do they spread so much propaganda that the idea of a nonconformist idol is met with disdain or even hatred? I'm imaging a conservative 1940's time where profanity or anti-establishment themes in your music would either end up with your career being destroyed, or society as a whole turning you, sometimes violently.
If the whole Hip-Hopista Bad Bitch vibe in the vein of Beyonce or Nicki Minaj is incompatible with the tradition of Idols, what if I made her more of a sensual Shakira type? Sexual, provocative even, but much more subtly. Looking back on her career, Shakira is effectively the Latin version of an Idol, especially her earlier work.