7. 'Til Death Do Us Part
Season 9 of Big Brother kicked off with a very romantic twist when Houseguests were matched with their "soulmates."
Not only would they sleep in the same bed and compete together, the couples would also be eliminated together. A few showmances sparked, a few relationships were kept secret, and the entire house seemed relieved when the twist wrapped up in the third week.
Watch every season of Big Brother on CBS All Access.