Could things still be frosty between CNBC queens Maria Bartiromo and Erin Burnett? Burnett was a noticeable no-show at the party for Bartiromo’s book, “The 10 Laws of Enduring Success,” at the Empire Hotel the other night. At the bash were a host of Bartiromo’s CNBC colleagues including Trish Regan, Scott Wapner, Michelle Caruso-Cabrera and Bob Pisani, as well at NBC chief Jeff Zucker. Both have denied a rivalry, with Bartiromo saying a few years back, “Erin and I are friends.” A CNBC rep declined to comment, but sources tell us Burnett had a 6 a.m. start at the New York Stock Exchange the following morning.