“I’m Lovin’ It” was the McDonald’s campaign launched in 2003 using that phrase.
The campaign began internationally in 2003 and made “I’m Lovin’ It” a central global expression of the McDonald’s brand. Unlike many earlier campaigns that varied strongly by country, this platform was designed to give the company a more unified worldwide identity.
The phrase was used across television, print, packaging, restaurant materials, and later digital advertising. Its conversational first-person wording made it easy to connect the slogan with customers, food, music, and everyday enjoyment.
The campaign is often discussed alongside the song and performers used in its launch advertising, but the slogan and the music are separate branding facts. The answer here is the campaign title itself. “I’m Lovin’ It” became one of McDonald’s longest-running global advertising platforms.