What was the name of McDonald's 2003 global advertising slogan?

“I'm Lovin' It” was McDonald's global advertising slogan launched in 2003.

The campaign marked a major effort to give McDonald's a consistent phrase and musical identity across international markets. Its wording used a conversational, upbeat style rather than presenting only a product claim, allowing it to work in advertising aimed at a broad worldwide audience.

The campaign is strongly associated with a jingle and with the singer Justin Timberlake, whose recording helped bring attention to the launch. McDonald's continued using the slogan for many years, making it one of the company's longest-running modern brand lines.

The slogan followed earlier McDonald's advertising lines such as “You Deserve a Break Today.” Those phrases belong to different campaign eras, so they should not be treated as alternative names for the 2003 campaign. The apostrophe and informal grammar are deliberate parts of the slogan's spoken, contemporary tone.