Which musician appeared in the music video connected with McDonald's 2003 “I'm lovin' it” campaign?

Justin Timberlake appeared in the music video connected with McDonald's 2003 “I'm lovin' it” campaign.

The campaign used a song and music video to help turn the slogan into a broader pop-culture identity. Timberlake was featured in the video for the song associated with the campaign, while the slogan and its jingle were used in McDonald's advertising around the world.

The arrangement is sometimes simplified into the claim that Timberlake wrote or performed the entire advertising campaign himself. The branding effort involved McDonald's agencies, musicians, producers, and market-specific adaptations. Timberlake's appearance was one prominent part of a larger commercial project.

The campaign was notable because it linked a fast-food brand identity to contemporary music marketing. Its short phrase, musical hook, and coordinated international rollout helped distinguish it from earlier slogans that were primarily spoken advertising lines.