It sounds to me like the woman is saying "She's getting dizzy, you're getting dizzy" that would also go inline with the title Sherbet Head. Maybe Sherbet Head is a state of consciousness?
I remember once when the late, great Terence Mckenna said something along the lines of... We humans like to escape our own heads, be it through drugs or alcohol, we enjoy experiencing changes to our consciousness. He then went on to say something like...
'what is the first thing that children do as soon as they are mobile enough? They lift their arms and spin around to the point where they become dizzy, fall over and the world starts to look very different'.
They are actively trying to perturb their reality. I think that with the references to Sherbert being a kid thing and 'head' in the title it somehow points to a state of being. That and the fact that the tune is very disorientating to listen to and sounds 'DIZZY'