What was McDonald's global tagline introduced in 2003?

“I'm Lovin' It” was introduced as McDonald's global tagline in 2003. The campaign gave the company a single phrase that could be used across many national markets while still allowing local advertising and menu differences.

The launch was part of a major effort to unify McDonald's worldwide marketing. The English wording was retained in many places, while advertisements were adapted with local languages, performers, and cultural references. Its short, conversational style was designed to sound natural in music, television commercials, packaging, and restaurant promotions.

The campaign is often associated with a song performed by Justin Timberlake, but the tagline and the music are not the same thing. Pusha T has also been credited with writing the original jingle. “I'm Lovin' It” replaced earlier slogans in prominence and remains one of the clearest examples of McDonald's modern global branding.