Famed for her surly manner and reported temper tantrums, supermodel Naomi Campbell may not be the ideal customer for many restaurant staff. However, the British beauty was clearly in a great mood last week when she reportedly tipped a waitress $10,000 after drinking with pal Cameron Diaz on a Sunday evening. The famous pair ate together at celebrity hotspot Nobu and then indulged in champagne and vodka at London’s Whisky oist bar, and left through a back door in the wee hours, but not before Naomi left the huge tip. “The waitress was absolutely shocked,” says one restaurant patron. “She didn’t know what to think or say. She was totally stunned by Naomi’s generous thank you.”