When you went to bed, you had oodles of friends on Facebook.
Overnight, someone's unfriended you.
We've all been there. And now there's a way to find out who ditched you!
A new app called Who Deleted Me does just that, sending you a notification when someone decides to give you the flick.
Cleverly, it will tell you if they've simply deactivated their account, or deleted you.
Don't worry - we still think you're brilliant!