The Most Surprising Celebrity Splits of 2010

From Scarlett & Ryan to Courteney & David, see the high-wattage pairs who went their separate ways this year (19 Photos)

Tiffany McGee on Dec 17, 2010 at 4:08AM

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The Most Surprising Celebrity Splits of 2010

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Zac Efron & Vanessa Hudgens

Disney Channel sweethearts Zac Efron, 23, and Vanessa Hudgens, 21, have been tween Hollywood's golden couple since 2006, when the High School Musical costars began dating. But on Dec. 13, E! Online revealed the two broke up. "They were together for so long. It just ran its course," a source said of the couple's four year relationship, adding there was "no third party involved."

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