Cutting It Short

Keira Knightley haircut slimming?

I’m thinking of cutting my hair short, with a longish fringe. The way Keira Knightley had hers. I look a bit like her (or so i keep getting told=) but i’m nowhere as skinny.
Are short haircuts slimming? Or would it make me look fat? Or would it make my squareish face look more square?

if you’ve a square face short hair will suit you as long as its not all one length

Photos Jessica Simpson’s Super Short Hair Cut