Why did I get this notification from Facebook?

[American Idol Fanatic 4ever]

I got an e-mail notification from Facebook saying that someone had commented on one of my photos on my profile. However, I did not know this person. I decided to check it out and clicked on the link in the e-mail to see the comment. After I clicked on the link and logged into Facebook, I got a notification that the page could not be viewed, because "the link was expired or I didn't have access to view the page." This person that left the comment called me a bad name and I do not have anyone with this name in my friend's list. My profile is on private and only friends can post comments on my profile or my wall. I scanned my photos for comments and there were no comments posted from this person, just from my actual friends.

Does anyone have any idea why I got this notification then or what is going on?

I don't mind getting notifications, but am confused as to why I got this one if only friends can post comments on my profile...

Thanks for your help! =)
Everything else seems to be fine with my profile.
@dragonwych, thanks! I just changed my password.

[dragonwych]

You got spammed, and may well have given out your password. I strongly suggest you change your password immediately. Stick to logging in to Facebook from its home page from now on.

[calmbird573]

Maybe the comments were delete...

[I LOVE MY INDIA]

Ya cud be a spam...it cud also mean that some one of ur friend wrote a comment then deleted the comment themselves before u cud read it which is why u got the notification...