Sometimes it just isn't meant to be, and that seems to be the case for a number of Tinseltown's biggest couples.
Heartache abounds in 2013 -- many of our once-favorite couples were left with broken engagements, divorce announcements, or just plain nasty breakups. And while some of these un-pairings we expected, others caught us completely by surprise. Grab a tissue and relive the year in celebrity splits:
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