I promise that I know you very well
Your eyes never lie even if they tell
Sweet lullabies that come with a smell
Of a dozen roses flippin' down the green hill

from Kendrick Lamar (Ft. Anna Wise) – Real Lyrics on Rap Genius

It is easy to see when someone is unhappy even if they surround themselves with material possessions or money. Kendrick relates to her because he is also a Vanity Slave at times

Kendrick also uses lie (as in being deceitful) and lie (as in lying down to sleep) in reference to lullaby. He also does this in the second verse.

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