I said to get real, don't you know who you're dealing with
Um, do you think you'll buy me lots of diamonds
By telling her partner to “get real”, she is suggesting that the tables have turned. While she originally was unaccustomed to the lifestyle and behavior of the wealthy, now she is savvy and “already coolest” in the social circles.
She tells him he is “dealing with” a wealthy vixen now, who wonders about the materialistic things like diamonds that she can get out of the American greed. After all, diamonds are a girls best friend
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