Which of these past Hollywood love birds do YOU want to see back together?
Aww, those were the good old days. Remember when we used to watch Blake Lively and Penn Badgley steal kisses on the set of Gossip Girl? What about when Chris Brown and Rihanna performed side by side and their chemistry was so hot, you could practically feel it through your TV screen? Even though many of these A-listers have since moved on from their failed loves, we are still holding out hope they'll rekindle their flames once again. (Yes, Kim Kardashian and Reggie Bush, even you!)