(May 18, 2013 - Source: Michael Buckner/Getty Images Europe) more pics like this »
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13. Rachel Bilson & Hayden Christensen
After being together for nearly a decade, Rachel Bilson and Hayden Christensen split for good in 2017. This isn't their first big breakup, though — he popped the question in 2009 and they called it off in 2010, but resumed their relationship just a few months later. They welcomed a daughter together in 2014.