What is the daily photo of the day app on facebook?

[DaDaDoo]

I'm not sure how it happened, maybe you clicked something and didn't know it? Either way, email the Facebook team and let them know.
To get rid of it, go to Account >> Privacy Settings >> Edit your settings (under apps and websites) >> Edit settings (next to apps you use) >> and click the 'x' next to any app you don't want to be able to access your info.
Hope that helps!!
PS: If you can't find the app on that list of apps that have your info, it's a virus/spam or something...and you need to contact Facebook again..ASAP! And don't click it under any circumstances! haha