Paul McCartney's Fiancee -- The MASSIVE Rock

5/9/2011 1:47 PM PDT
Look at your knuckle ... now look at the ring on Paul McCartney's new fianceé Nancy Shevell ... it's the size of HER knuckle. Not too shabby, huh??

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Shevell was sportin' her new rock out in NYC this weekend ... and if the rumors are true -- that Paul spent $650k on the ring -- lady needs to get herself a bodyguard, STAT!