There are several ways to look at these outfits. If you are fairly slim and have a real waistline, belts are nice. However the focal point is the bright colored sweater. Any cardigan in a bright color with straight lines can be used to update an outfit. For myself, I would wear it unbelted. The dress with sweater would, for me, become a straight skirt and perhaps a matching top. Just think, a bright yellow sweater with a black or navy skirt and top and you have summer. Add a pair of green shoes and you pop. So let's pop.