OMG! You're my favorite actor! (Or maybe not...)

Have you ever spotted a celebrity—or someone you can swear is a celebrity, but you can't remember what their name is?

Better yet, have you ever spotted one of your favorite celebrities—although in retrospect, you discover it's not the celebrity you thought it was?

Check out this woman, who saw Matt Damon and took a picture with him. Oh, yeah, but it was actually Mark Wahlberg.

You've gotta hand it to Marky Mark, though. Because when he got wind of this woman's photo, he posted it to his Facebook page with this caption:

At least she didn't make him apologize for We Bought a Zoo...

I love good sports. Definitely gives me good vibrations.