Someone asked for advice (in the comment section) for what to wear to their Sorority Alumnae Formal. Since you didn't say whether you were on a budget or whether you preferred long or short dresses, I included a variety to get you started.
Whatever dress you end up buying, make sure it's comfortable because you will be wearing it all night and most likely dancing as well.
As a sorority alum, I can relate to finding beautiful yet comfortable formal dresses because you will be in it all night and don't want to worry about something not fitting or feeling uncomfortable while trying to dance or catch up with old friends.
Avery Halter Short Prom Dress $69.90 Windsorstore.com
BCBG Strapless Silk Gown $360.00 Nordstrom
Yoli Halter Prom Dress $139.90 Windsorstore.com
Dee Dee Strapless Prom Dress $149.90 Windsorstore.com
JS Boutique Strapless Ruched Satin Gown $98.00 Nordstrom
Jewel-Embellished Taffeta Gown $498.00 BCBG (bcbg.com)
Joan Strapless Prom Dress $99.90 Windsorstore.com
Way-In Sweetheart Party Dress $68.00 Nordstrom
Strapless Taffeta Gown $598.00 BCBG
Strapless Printed Gown $468.00 BCBG
Adriana Papell One Shoulder Jersey Gown $148.00 Nordstrom
Tiered Silk Gown $448.00 BCBG
Back-Detailed Jersey Gown $298.00 BCBG