When you are dressing for a job interview, image really is everything. The image you present to a potential employer is the first thing they are going to notice about you - before you even have a chance to say a word or shake a hand.
In order to make a good first impression, you need to dress professionally and separate your social image from your professional presence.
Never wear Flip-flops or sneakers.
Underwear (bras, bra straps, briefs, boxers, etc.) that is visible.
Don't wear any underwear that shows - even if your bra straps match your top.
No Shorts, Jeans, Pants that are too low-rise or too tight.
Blouses that are too low-cut or too short - don't show your cleavage or your belly.
Make sure the top of your thong, if you wear one, doesn't show above your pants.