Boxermon, check out this blogger and how she styled her sequin skirt. I think it looks really nice. I also think a Jcrew tippi sweater would look nice if you want something more fitted and add a nice necklace. I think the main thing is to let the skirt do the talking and keep everything else quite simple. But make sure you have a cute clutch. When is the wedding? I will keep thinking of ideas.
http://www.extrapetite.com/2012/04/something-borrowed-sequin-pencil-skirt.html
Thanks, this helps!
