In February, Facebook users became instafriends with the likes of Brad Pitt, Megan Fox and Kira Knightly. Except that they weren't. Turns out, it was just their same old boring friends who posted photos of their celebrity look-alikes in celebration of Doppelganger week. The viral trend burned brightly for a few weeks and spurred the hilarious Facebook group, "Everybody is making fun of your Doppelganger pic behind your back." You can think you look like Matthew McConaughey we just reserve the right to disagree.