Becoming a Big Head

When I first started the diet, I spoke to my 7 year old about it.  She's already very aware of her larger frame and concerned about weight.  At 7?  :-(  Anyway, we were talking about the diet and me losing weight.  She asked if I was going to end up with a big head.  I, of course, thought she meant conceited.  When I questioned it, she said "No, the girls in the pictures.  The skinny ones with the really big heads."  Ah, super models.  How very observance she is at 7.  Yes, those girls do appear out of proportion.  And no... I assured her.  Mommy will never be a big head.