StumbleUpon wants to reward you for those long hours at work you spend trolling the internet for fashion finds. The web app (one of our faves) is holding a Best of Spring Fashion contest, and wants you to submit the best Spring 2012 fashion looks you've, well.. stumbled upon--and they're prepared to give away a sweet prize for the best-curated selection. Sounds good, right? Well, it gets better: we're going to be judging the contest, so be sure to come correct! To enter, get your clicking finger ready, and StumbleUpon interests like fashion and accessories. Put together a look of up to five pieces from five different websites of the items you've found. Make a photo collage of your finds, and then send it here, to the folks over at StumbleUpon. The winner will get a $400 gift card to spend on Nicole Richie's House of Harlow 1960 accessories, and the runner-up will receive $100. For up-to-the-minute info on the contest, you can follow us, and House of Harlow 1960 on our respective StumbleUpon pages. You've got until May 7th to enter, so get to stumbling!