And in the spring I shed my skin
And it blows away with the changing wind

from Florence and the Machine – Rabbit Heart (Raise it Up) Lyrics on Rap Genius

Meaning

Comparing herself to a snake, shedding its skin, Florence feels like she is shedding a layer of herself.

It would be gross to link to an image of a snake losing its skin. Instead, here’s a nice snakeskin Ferragamo bag, relevant because it was made with shedded skin:

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