Just yesterday, after syncing my iPhone, I realized that my address book on iPhone was EMPTY - no longer did it display my friends' names - just phone numbers. I immediately went to check my Address Book on my MBP - it was empty as well. I'm really miserable as I believe I did not have any backup and have lost 300+ contacts (and I don't use TIme Machine). Is there any way to retrieve my contacts?? It appears that the culprit here is an app called BirthdayScanner X (though it probably isn't the culprit), which I deleted off my MBP earlier that day, and apparently it erased all my Address Book data?!?!? I still have the entire app (with its files) in my trash bin, if that could be of any help in retrieving anything? PLEASE HELP. I would really appreciate it.