If these past and present celebrity couples are any indication, people really do start to look alike when they're dating — at least when it comes to coordinating outfits. Kim Kardashian and Kanye West regularly make us do a double take when they wear complementary colors, and when Justin Timberlake and Jessica Biel stepped out in the same suited-up look, we couldn't help but think of another time JT matched his other half. Who could forget when he and Britney Spears were a denim-on-denim duo? Other repeat offenders include Jennifer Aniston and Brad Pitt, who coordinated not just together, but also when they dated other people — like the day Brad's hairstyle closely resembled then-girlfriend Gwyneth Paltrow's. Look back at some of the most memorable matching moments from celebrity couples, then check out famous duos you forgot were married.