Why's it "don't you cry" instead of "you don't cry?"

Native speaker’s answer
Rebecca
So here, it's "don't you cry" since the sentence should be "don't cry," as in telling someone not to cry, as a way to comfort them. Don't you cry" is also considered a little old-fashioned and sounds like it would be in a poem or a song. Or it could be used to say "don't you cry in addition to other people." If it were, "you don't cry," it would be asking someone or telling them that they don't cry. " Ex: I will be here, don't you cry. => lyrics from a song Ex: Don't you cry now. We need to talk about this calmly. Ex: You don't cry? Why not?