This one from J Crew Factory is similar and only $19.99. Or loving this ruffle shoulder cardigan from Banana Republic.
On another note, I don't ever keep "fat jeans' just in case because that would only encourage me and justify me keeping weight on so I just get rid of clothes that don't fit rather than keep them in my closet. Same with "skinny" clothes. Only keep clothes that fit and then when you lose weight/gain weight, buy new ones, because when you have to buy clothes a size up, you'll be reminded of how much weight you've gained and that might encourage you rather than buying new clothes to go work out instead! Or if you've lost weight and you get to buy new "skinny" clothes than it will be a reward for your hard work! But the point is, only wear clothes that currently fit your body because anything that isn't your size will just be doing a disservice to yourself no matter what size you are.