Cardi B's Casual Speech and RealnessPlay video
In regular speech, Cardi B uses Chicano English and AAE features; she says when she speaks, she doesn't care about her accent, unlike when she sings.
Cardi B's authentic accentPlay video
Audiences applaud Cardi B for embracing Chicano English in her rap music. She also uses AAE features in a way that is typical for rap music.
Article that looks at the features of AAE (and specifically Baltimore AAE) through the lens of The Wire.
Transcript of interview with Walt Wolfram in which many aspects of Southern English are discussed. Audio available on website.