Mac App Store Updating Nonexistent Application?

I recently purchased a Macbook Pro. After using the App store to download a few applications, it now show I have an update for Angry Birds. I have never downloaded Angry Birds, but when I try to update it, it shows another App Store account that doesn't belong to me. I've searched online for how to fix this, and have found out that the email is associated with a pirated app. The fix provided is to delete the application, but the application doesn't show up on my system. It isn't in the applications folder and searching for angry birds finds nothing. I've also tried to repair disk permissions and have had spotlight reindex my files, but this still hasn't fixed the issue. Any idea as to how to fix this? Also, how would this have gotten onto my brand new Macbook? Thanks for any help!