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Nah. The whole point is that of course she didn't think her head was going to explode. The word 'literally' just serves to put more emphasis on the expression.
I've never understood why people chose to get so angry at this one specific way that language used in everyday conversations differs from what you'd write in an essay. Oh no, a word not being used LITERALLY in its literal sense. Whatever next?
Wouldn’t hyperbole be ‘I thought my head was going to explode’. The inclusion of ‘literally’ should be for the purpose of differentiating from hyperbole.