Which musician sang on the 2003 recording associated with McDonald’s “I’m lovin’ it” campaign?

Justin Timberlake sang on the 2003 recording associated with McDonald’s “I’m lovin’ it” campaign.

The campaign combined a slogan, a short musical hook, and a pop-oriented recording to create a global brand identity. Timberlake performed the vocal for the song connected with the campaign, while the advertising used the recognizable musical phrase across multiple formats and markets.

The campaign was launched in Munich in September 2003 and then expanded internationally. Its music helped McDonald’s make the slogan feel like a contemporary entertainment brand rather than a conventional product line. The partnership also reflected the growing importance of music and celebrity associations in major advertising campaigns.

Timberlake is sometimes confused with the writers, producers, or artists involved in related versions and adaptations of the campaign music. The question concerns the prominent vocal performance associated with the 2003 recording, not the authorship of every musical element or every later localized advertisement.