Which singer performed the pop track associated with McDonald's 2003 “I'm Lovin' It” campaign?

Justin Timberlake performed the pop track associated with McDonald's 2003 “I'm Lovin' It” campaign.

Timberlake recorded a song titled “I'm Lovin' It,” which was used in connection with McDonald's global advertising campaign. The track helped give the slogan a contemporary pop-music identity and linked the campaign to a prominent international performer.

The advertising phrase and the commercial song are related but not identical in purpose. McDonald's used the slogan as a long-running brand message, while Timberlake's recording served as part of the campaign's musical presentation.

The campaign also became known for its short vocal hook, often written as “ba da ba ba ba.” Because several producers, writers, and advertising contributors were involved, credit for the campaign can be confused with credit for the recorded performance. Timberlake is the performer most directly associated with the pop track.