Sir Paul McCartney has shared a rare photo of his wife Nancy Shevell to mark their ninth anniversary.MORE: Vernon Kay and Tess Daly enjoy sweet date night after I'm A Celebrity stint - see gorgeous photoThe Beatles star posted a beautiful photo of his other half, and 60-year-old Nancy could be seen smiling as she looked at the camera, wearing beautiful drop earrings and a pretty multi-coloured top.But sweetest of all was Paul's heart-melting caption, in which he called Nancy his "rock and roll,