What global McDonald's slogan debuted in 2003 and remains associated with the brand?

“I'm Lovin' It” is the global McDonald's slogan that debuted in 2003.

McDonald's launched the campaign internationally in September 2003. The phrase used casual, conversational language and was paired with a distinctive five-note musical motif, making it adaptable across countries and languages.

The campaign was created with advertising agencies including Heye & Partner, DDB, and Leo Burnett. Musician Pusha T has said he co-wrote the original jingle, while Justin Timberlake appeared in an early campaign performance.

The slogan is sometimes incorrectly attributed solely to Timberlake because of his prominent role in early advertising. His appearance helped popularize the campaign, but “I'm Lovin' It” is McDonald's brand platform rather than a song title created exclusively by him.