Star Couples: Will It Last?

Do Ben Affleck and Jennifer Garner have what it takes to stay together? You be the judge: Cast your vote on them, Beyoncé and Jay-Z, Cameron and Justin, and others. By Serena Kappes

CAMERON DIAZ & JUSTIN TIMBERLAKE

They were recently spotted checking out a $13 million Pacific Palisades estate, and Diaz was seen sporting a sparkly something on her left ring finger, but her reps insist that marriage isn't on the agenda for the couple of more than a year.