I love a challenge, & that's exactly what I got with this Dress for Less Request from Rocker Chic! "I'm looking for something to wear to a wedding in July. I need something fun and sexy. Its an evening wedding. Budget is under $40.00 Use whatever stores you like. Shoes do not have to be included. Good Luck!" Here's what I came up with, the budget made it hard to find a cardigan/jacket for this so hopefully you have something! (I've never done a wedding look before so hopefully it's okay, if not I can try again ;) )
Convertible Dress (other colors): Target $29.99
(If you can go a few dollars over, I really love the purple dress at the bottom right corner from Forever 21 for $32.80; also if you want to go a little lower in price a black Forever 21 dress for $22.80)
Earrings: Forever 21 $3.80 (3 pairs)
Clutch: Forever 21 $3.80
TOTAL: $37.59
Optional: 
Sandals (other colors): Kohl's $29.99
Bracelets: Forever 21 $3.80
TOTAL WITH OPTIONAL: $71.38

Remember, you can request a Dress for Less segment at this page!

UPDATE: Also enter this awesome contest: