Yeah, I don't envy Crystal Rain ITTL; being the daughter of Corpus Christi's most famous resident (and who is basically seen as Elvis, the Beatles, and Madonna rolled into one by the local community (1) (2)) is not easy, IMO. At least she's in Los Angeles a lot of the time; it makes a lot of sense for Selena to move to LA for at least some of the year, as LA is a huge media and entertainment center (and, in the US, it's the equal to NYC in terms of that). It helps that LA is like an ocean compared to the fishbowl, as another post pointed out, that Corpus is...
I'm betting that, ITTL, there are thousands of young girls named Selena in the US and the Latin countries...
(1) IOTL, after Yolanda Saldivar was convicted of murder (and is lucky that it wasn't a death penalty case; many Hispanics would have happily volunteered to sentence her to death and carry it out themselves, IMO), she was isolated when she got to jail and has been in isolation ever since; this is because, IIRC, many Hispanic female inmates threatened to harm Yolanda for what she did to Selena.
(2) A parallel should be pointed out here between Selena ITTL and another famous Latina singer IOTL: Gloria Estefan (who was Cuban). Both Selena and Gloria were the lead singers for their bands, both their husbands were in their respective bands (and, IIRC, I think members of Gloria's family were in her band), and both had multiple #1 hits (ITTL for Selena, of course; Gloria's #1 hits, both with Miami Sound Machine and solo, were before the POD and are, therefore, unaffected), and both put Latin music (Tex-Mex ITTL and Cuban IOTL (as the peak of Gloria's career was in the late 1980s and early 1990s), respectively) into pop culture. Basically, what Gloria Estefan did in putting Miami on the map IOTL with regards to music, Selena did with Corpus Christi ITTL (and IOTL, Selena was probably a fan of Gloria Estefan's, which would make sense since she was starting her own career when Gloria and the MSM were at the height of their careers), and there's another strange parallel: both either died or nearly died young (Selena's sad fate is known, and Gloria Estefan nearly died in a bus crash in 1990, which is an interesting WI in and of itself, IMO)...
Just my .02.