1. McDonald’s “I’m Lovin’ It” Launched in 2003, this jingle quickly became one of the most recognizable in fast food history. It was backed by a global campaign and used in nearly every commercial.

In the '90s and early 2000s, before the world of high-speed internet and smartphones, we had our televisions to tune into. And those TVs had a lot of commercials. While most commercials are skipped ...