Salma Hayek’s ties to Balenciaga could spell trouble for Nicole Kidman following their cringe-worthy showdown at Paris Fashion Week. RadarOnline.com can reveal how Kidman’s position as a brand ambassador for the controversial fashion house could be at risk, especially with Hayek’s husband, billionaire François-Henri Pinault, calling the shots. A now-viral moment from Paris Fashion Week hit airwaves on Sunday, showing Kidman and Hayek having a red carpet tiff while attending the brand’s runway show. The two stood with singer Katy Perry in front of photographers, where an altercation apparently …