"Red Carpet/Hollywood" Themed Dance Dress Help, Please?

Alright so i want to buy the dress for my 8th grade dance and its like a huge thing, the theme is Hollywood/Red Carpet.
Ive already started looking a little and i found ones i like, the only problem is that theyre strapless and im pretty much a skinny minnie lol.

i found this dress but idk if its "red carpet" enough but i think its so pretty,
http://www.forever21.com/product.asp?catalog_name=FOREVER21&category_name=dress_dressy&product_id=2056655907&Page=all

I also found these strapless ones but i would like one simular with straps,
http://www.forever21.com/product.asp?catalog_name=FOREVER21&category_name=dress_dressy&product_id=2055672540&Page=all
http://www.forever21.com/product.asp?catalog_name=FOREVER21&category_name=dress_dressy&product_id=2055757680&Page=all

do you like the first dress?
also, send links to any other dresses, NOTHING EXPENSIVE FOR SOMETHING IM GONNA WEAR MAYBE TWICE.
also if you have any suggestions feel free to include.