So you are saying that because young pop stars/actors are mostly no longer northern European in appearance, we can expect that the tabloid news media are now going to do a 180 and decide that the cases of missing white women are not as profitable to exploit as those of more southern-hemisphere appearance? I think it's not that simple.
As someone else pointed out, the primary selling point of stories like these is fear. The audience they are looking to scare is not people who look like the missing person, or aspire to, but older people who think that young-people-who-look-like-the-missing-person lead charmed lives. So it is exploitation of the fear of what's possible for someone else that tends to drive it, as in, if it could happen to this perfect Barbie-looking girl, could it not happen to your grand-daughter? It's not only race that factors into it, but age; the victims who get the most attention are not only pretty and thin, but almost invariably young, too.
About a decade ago, a woman of my acquaintance was killed by the guy she was dating; he claimed accidentally. (She was white, as it happens, and about 50 years old.) They had been at a party, and they started to get into a disagreement, she said that she wanted to leave and be taken home, so they left. 5 minutes later he ran back to the house yelling that something was wrong with her. She was lying on the lawn, not breathing, with apparently not a scratch on her. At first the authorities thought she'd died of natural causes, a heart attack or maybe a stroke, though she was very petite and had no medical history of cardiac problems, but she did have arthritis. A family member insisted on an autopsy, and that's when it was discovered that her neck was broken. He had grabbed her by the shoulders and shaken her, and her neck snapped, killing her instantly. He didn't even realize in that moment that he had killed her. It turned out that he had a history of domestic violence, and had previously served jail time for an assault on a different woman. There was almost no publicity about her death, not even locally; I remember having to hunt for a news article when I heard that charges had been filed. It took a while for the wheels of justice to turn, but 2 years after she died he was convicted of second-degree murder. He claimed it was an accident, that he never meant to kill her, but the prosecution successfully argued that he certainly did mean to *hurt* her, both on that occasion and on other occasions when people had seen him lay hands on her, and that that was enough to show malice aforethought. He was sentenced to about 25 years in prison for the killing, but that story was a tiny blip on the radar as well; a single paragraph in the newspaper, buried deep in the local news section; no television reports as I recall.
So, why wasn't there big news coverage? Mostly her age, I think, and the fact that there was no prolonged mystery about how she died and who had killed her. There was no suspense in the story, so it did not, as they say, have "legs". She was a very nice person, may she rest in peace.