Which McDonald’s slogan began its worldwide campaign in 2003?

“I’m Lovin’ It” began McDonald’s worldwide advertising campaign in 2003.

The phrase became one of the company’s most recognizable modern brand slogans. It was used across television commercials, radio, packaging, restaurants, and later digital marketing, giving McDonald’s a consistent message in many countries.

The campaign was associated with a music-driven identity and a short, memorable vocal hook. Justin Timberlake appeared in an early promotional music video, while the campaign used different advertising executions in different markets.

People sometimes confuse the slogan with the earlier “You Deserve a Break Today,” which McDonald’s launched in 1971. The two slogans belong to different advertising eras: one reflects the company’s early mass-media advertising, while “I’m Lovin’ It” became the signature phrase of the 2000s.