Commercial jingles are composed with a purpose: to ensure a brand's name and product stick in your brain, by leveraging unyieldingly catchy musical hooks. Ahead of the Super Bowl this weekend, listeners call in to share the jingles that have stuck with them, and Steve Karmen, composer of over 2,000 ad jingles, including "Nationwide is on your side," Budweiser's "Here Comes The King," and "Trust the Midas touch," talks about changes in the jingle-writing landscape, and what it takes to write catchy tunes that sell products.