was licensed to the National Milk Processor Education Program (MilkPEP) in 1995 to use on their celebrity print ads, which, since then, have included celebrities from the fields of sports, media and entertainment, like Britney Spears, Beyoncé, Rihanna, Serena Williams and Venus Williams, as well as fictional characters from TV, video games and films such as "The Simpsons", "Dexter's Laboratory", Batman, Mario and "The Powerpuff Girls" posing in print advertisements sporting a "milk mustache" and employing the slogan, "Where's "your" mustache?"