Kristin Cavallari at Walter Spring 2010 Fashion Show

Kristin Cavallari is wearing a sexy black dress at Walter Spring 2010 Fashion Show at the Metropolitan Pavilion in New York during the Mercedes-Benz Fashion Week. So, is this girl from ‘The Hills’ really dating John Mayer secretly for years already? John must be pretty good at something else other than his music for a beautiful lady like Kristin to play along … but to date both denied there is such a thing between them.