What happens if you make a purchase using a closed bank account?

My sister bought a song on iTunes (for some reason her fingerprint is saved on my iPhone so she was able to) However, the bank account linked to my iTunes is old and the account is CLOSED. But she was still able to buy the song. What is going to happen

You will be charged for itl

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You will be charged for the song plus an overdraft fee

It doesn't get paid, obviously.