The "belt with a bow" is a style I don't think will be going out of fashion any time soon, and personally, I'm pleased. It's a nice, easy way to "pretty up" an outfit, even a boring old black trousers and top combo, like the one shown at ASOS. This belt is £10, comes in gold or silver, and has a "double buckle" feature which presumably helps you get the fit just right.
Soft leather bow belt at Accessorize | Anna Vince sculpted belt with bow | Amet and Sasha bow belt


