Not all on-again-off-again couples end up off-again. After years of boomerang dating, the couple were finally married in October 2012. And Timberlake is clearly pleased with the decision. "Every once in a while, I can catch a glimpse of her when she doesn't see me looking," he told Ellen DeGeneres in April. "I have this moment where I'm like, 'If you never make a good decision—if you only make bad decisions—for the rest of your life, you made one really good decision.'" And just to insure that JT doesn't make a bad decision in his marriage, they reportedly have a prenup that pays Biel $500,000 if he cheats.
 
It seemed like seventh heaven when Jessica Biel and Justin Timberlake made it official back in 2007, but the active duo fought cheating and breakup rumors throughout their relationship. They stuck it out until a prettyofficial split was reported in March 2011. After being linked to the likes of Mila Kunis (Justin) and Gerard Butler (Jessica), the twofound their way back to each otherby summer's end. This time, it looks like they're playing for keeps. JT proposed over the holidays, so these too may be together “Until the End of Time.”Aww!
 
This is one of the few couples that prove that breaking up will work out in the long run. JT and Jessica recently got hitched, but they called time-out on their relationship from May 2011 to September 2011. Almost exactly a year later they got married.  
 
This twosome are reportedly planning to tie the knot this summer after what seems like quite a long road to wedded bliss. The Sexy Back singer finally proposed to his long-time actress girlfriend last December, but who would have thought given that they called it quits back in March 2011 after four and a half years of couplehood? Justin and Jessica brought the romance back when they reunited toward the end of 2011. Now let's hope this on-and-off couple keep it on for real this time.