McDonald’s launched the “I’m Lovin’ It” slogan in 2003.
The campaign was introduced internationally as a major global branding effort. Its wording used an informal, conversational style that was designed to sound personal and upbeat rather than like a traditional corporate claim.
The campaign is also associated with the “ba da ba ba ba” musical signature, which became closely linked with McDonald’s advertising. Justin Timberlake appeared in an early promotional version, while the slogan and jingle were adapted for markets around the world.
“I’m Lovin’ It” followed earlier McDonald’s advertising lines such as “You Deserve a Break Today.” It remained one of the company’s longest-running global slogans, although local advertising often used additional language alongside it.