Which singer performed the vocal hook in McDonald’s 2003 “I’m Lovin’ It” campaign?

Justin Timberlake performed the vocal hook in McDonald’s 2003 “I’m Lovin’ It” campaign.

Timberlake recorded the vocal associated with the campaign’s memorable “ba da ba ba ba” motif. The sound became an important part of the branding because it could be recognized quickly and reused across many commercials and markets. The campaign paired the audio hook with the slogan “I’m Lovin’ It,” which McDonald’s introduced globally in 2003.

Timberlake’s participation is sometimes confused with the work of other musicians connected to the campaign’s development and production. The singer’s contribution was the recognizable vocal performance used in the advertising, while the wider campaign involved agencies, producers, songwriters, and international adaptations.

The hook helped turn a slogan into an audio identity. This was significant in McDonald’s branding history because consumers could recognize the company from sound as well as from its Golden Arches, restaurant colors, packaging, and character imagery.