I am having this exact same problem with Angry Birds. I do not have this game installed on my laptop and an update is available for some Russian email address. It is asking me to change to that account and update there.
Hope there is a fix. I tried contacting the App Store support. What a runaround I got there.
Hope someone has an answer in here.
I found a sollution posted by Peter Jarvis that worked for me.
Select the app in applications folder, right click, select "Move to Trash".
Launch App Store
Select updates in the App Store
* App should now show "INSTALL"
* App is downloaded and installed
If this does not work, put the current app back and contact apple.