TikTok creator Romeo Bingham made up a new jingle for Dr. Pepper that was so good the soda company used it in a TV ad. Now other TikTok creators are flooding the app with their own jingles to have the same thing happen to them. For the first time in Dr Pepper’s 140-year history, the brand is the second-most-popular soda in America. Now it has a shiny new jingle to match.