What should I wear to be in the audience of an X Factor taping?

Okay, my mom get free ticket's for the 14th to go to the X Factor taping, she says they say to look really nice like if you were going clubbing or to a really nice restaurant, but she wants me to wear this WHITE dress, and it's reaally nice looking, and I don't really want to stand out. They say they pick the best looking people to sit behind the judges, whatever cool, but again I don't want to stand out, do I still wear a dress? There's only two things I'll bother wearing. (My aunt and uncle usually invite us to parties that are really top notched to my closet it basically filled with 'galla' type dresses, but this is just a taping so I'm nervous on it) one, this plain strappless flowy black summer looking dress, up to my knees - and then a dark navy type strapless dress with a lighter blue bow attached under the bust (the only thing that bother me is the bow;; not wanting to look to dressy) that stops above the knee, its not as flowy and is not to tight, but it fits like a business skirt would. Any advice?