ios7 taking 11GB space? HELP!

Hi guys,

I have a 32GB iPhone 5 and previous to updating to ios7 i had my whole itunes library on my phone which left me about 1GB of space. After the update when i synced my phone up to itunes according to the status bar along the bottom of itunes i seem to have 11GB in 'other' on the phone. What could this be? I can now no longer sync all my music which is the only reason I went for the 32GB version!

Please help!