I have been along to two VJ interviews. I have seen every sort of attire possible. Midriff tops are not out of the question. As long as you are prepared to stand on a stage to sing and dance it doesnt really matter to them. The interviewer actually wore a denim jacket. Another suggestion and you can call me bitter and twisted but the younger, blonder and more buxom you are the better. VJ have no interest in your customer service skills nor your experience at that first interview. Good luck to you at your interview.