Best of 2010
It's a Bust! The Year's Biggest Splits
Scarlett Johansson & Ryan Reynolds! Zac Efron & Vanessa Hudgens! This year brought dramatic changes to long-standing couples
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COURTENEY & DAVID
It was an odd coupling from the start, but the raven-haired Friends beauty and the goofy Hollywood scion seemed to have found a lasting love equation – at least by Hollywood standards! Married in 1999, the couple welcomed daughter Coco in 2004 after several public miscarriages. Open about stints in therapy and the difficulties of marriage, Cox summed it up blithely in 2006, "We just really like each other." But by 2010, the feelings had waned and the two announced a trial separation. A distraught Arquette later admitted that it was a combination of his immaturity and their declining sex life that led to their union's demise.

