I'm getting close to the halfway mark on my list of 100 cheap party dresses, and the next three are all one-shouldered frocks for under £50. While we're talking one-shoulder, can we settle the 'off the shoulder' argument once and for all? These babies are not off the shoulder. Since one strap sits on the shoulder, that doesn't really work. These are one-shoulder, and off-the-shoulder looks like this. Now I've cleared that up, these dresses are (l-r) metallic trim black short dress £36.21 at Mango, green one-shoulder chiffon bow dress £14 at Peacocks and silver snake dress with puffball skirt £48 at Miss Selfridge.