Back to Black

Back to Black

In Amy Winehouse BACK TO BLACK song, what does she mean when she says “ You go back to her And I, I go back to black”?
Would it be “voltar ao luto”?

By the way What is the right way to speak WINEHOUSE? Some say
“uinehause” other say “uainehause”. Which way is right, or more suitable?

Thanks to anyone who’d be pleased to give me some explanations about.

Zumstein