When a good thing goes bad it's not the end of the world
It's just the end of a world that you had with one girl

from Drake (Ft. Stevie Wonder) – Doing It Wrong Lyrics on Rap Genius

Meaning

When you break up with a girl, your life isn’t over, dude. But the times you are used to having with her are over.

The first two lines are lifted almost verbatim from the Don McLean song “When a Good Thing Goes Bad”. Lyrics from another McLean song, “The Wrong Thing to Do”, are later used in the hook.

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