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Bachelor contestant Jake Pavelka and his chosen one, Vienna Girardi, have ended their relationship, their rep confirms. "Jake and Vienna have split and appreciate respect for their privacy at this time."

Vienna broke the news on Saturday when she told Greek actor Gregory Michael that her engagement was over, according to OK magazine.

This is the 13th failed Bachelor couple leaving Jason Mesnick and Melissa Rycroft the only pair to have been successful ... so far.

This leaves us to wonder ... are reality show couples destined to fail (Bachelor couples, Heidi and Spencer, Nick & Jessica, etc, etc)?