Opencart Customer Feedback Page

Hi,

One of my clients has asked me to build an e-commerce website, so for this I've used opencart and its almost done. But, he has also requested a page where customer's can post pictures of them wearing their clothes for a chance to win store credit etc. What would be the best way to achieve this?

I usually use wordpress, so is there a plugin that I could I integrate into the website somehow? Or is another approach better?

Thanks for any help.