When the day comes
And they looking far away from where they came from
See the night has betrayed them told em it would stay young
When she= (they), meaning people like her, come to a sudden realization that the life they have been living ruined them as a person. They would then want to run away and escape their current situation.
Not only will her fame go away but the people in her life that assured her she will be fine will turn their back on her and she’ll become betrayed by the life she was living.
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