The icing queen If Paris Hilton can trade in on her celebrity to market product, why not Marissa Mayer? Don't worry. Unlike the ubiquitous heiress, Google's Mayer is not putting her name to perfume. But she's backing a new custom cakemaker in San Francisco. The Google product executive — who became a celebrity on Valleywag at least because of her laugh and an affair with Larry Page — has unveiled a "partnership" with I dream of cake , Shinmin Li's whimsical patisserie. Here's Mayer, with the icing artist, at a party for the venture at Mayer's Four Seasons penthouse in San Francisco. [Photo credit: SFluxe .]