Here at Sociological Images, we’re interested in how our standards of beauty are based on a European (that is, light-skinned and straight-haired) ideal. See here and here for examples. A reader pointed out that Syesha Mercado, a contestant on American Idol, has been progressively de-ethnicized.
Here is a photo of Syesha from early in the competition:
Here is a photo of her from this week (end of April):
However, the stylists have thus far let the white kid keep his dreads:
Thanks for pointing this out, pj!