It goes without saying that different races generally find different attributes attractive from one another. There are some things that transcend race--studies show that the ideal face is symmetrical, and so on. When looking at body type, there are huge discrepancies among many of the common races seen in America. Among Caucasians, the all-American girl is generally deemed ideal: tall, skinny, blonde, blue eyed, large breasts, etc. After all, that essentially describes Barbie dolls. Asians are similar in that petite women are traditionally thought of as the best. Each of these examples stands in sharp contrast to African American and Hispanic / Latino women, who are typically larger. In each example, women with "curves" are frequently preferable to the Dove using flat assed counterparts described in the Alienated Conclusions blog.
Thus, it isn't all that surprising that some incredibly popular music released by the black community glorifies women with fat asses, to put it bluntly--their art represents their ideals. We've come a long way from the age of Josephine Baker and the routines described in "Selling Hot Pussy": "she handled it as though it were an instrument, a rattle, something apart from herself that she could shake." Still, in both of the videos below, black women are still doing just that.