Aeropostale (US) is offering 50% off everything on their website.
Prices are as marked on the website. This Bolt Raglan Sweatshirt was $34.50 but it is now on sale for $17.25. Match it up with a pair of jeans like these Lola Destroyed Medium Wash Jeggings which were $54.50 and are now $27.50.
You could also just pick out a dress which plays double duty. This Solid Ponte Dresswas originally $59.50 and is now $29.75. it is an inexpensive little black dress you could dress up with heels and flashy jewelry, or dress down with flats. The dress also comes in blue for some variety. Nothing beats a little black dress but it is so much better to be the little blue dress in a room full of little black dresses.
Now, while the website says "Free Shipping on $75" that does not apply to Canadians. That is only for the USA. You will still have to pay $12 for shipping. Also, you could be subject to duty and customs when your package crosses the border. If you live near an Aeropostale you might want to check in store for this deal.