what do you think about this sentence?

[dilodi83]

We were surprised when we turned up at the party because the host was wearing a kind of Superman......................... with a mask, cape and blue bodysuit.

In this sentence I was supposed to add either fancy-dress or getups and I chose "fancy-dress", but I checked out the key-answers of the book I've taken this from and it says that only "getups" is correct... what do you think about it? and if you agree with the book, could you please explain why my answer is wrong?

Thanks so much in advance.

[5jj]

'Getups'' is incorrect. I would use 'costume', but 'getup' is possible. 'Fancy dress' is normally more general - 'He came in fancy dress' or 'we had a fancy-dress' party', but it's possible in your sentence, in my opinion.