Wow, I think I'm in love with this awesome aqua dress:
Macys.com - London Times Ruched-Waist Halter Dress - $139.00
I love how pretty and flowy this dress is and how the ruched band around the waist breaks up the vertical fluidity just a tad, adding personality to the dress without the addition of another color...not to mention I just love turquoise, in general. This dress would make a great daytime or nighttime date dress - just switch out your accessories for the time of day. This dress would also work well as a wedding dress (for a guest, not the bride, of course) - especially for a fun summer wedding.
Add some dangly earrings and call it a day! Pair with silver strappy shoes to create an overall posh look.