Which singer performed the vocal part associated with McDonald’s “I’m lovin’ it” campaign?

Justin Timberlake performed the vocal part associated with McDonald’s “I’m lovin’ it” campaign.

The campaign launched in 2003 and included a promotional song and music video connected with Timberlake. His involvement helped give the advertising platform a pop-music presence, although the campaign’s short musical signature became more widely recognized than the complete song.

This fact is often confused with the work of producer and musician Pusha T, who has been widely credited in later accounts with contributing to the jingle’s composition. Timberlake’s role was as the singer and performer associated with the campaign, not as the advertising agency or sole creator of the brand platform.

The campaign combined celebrity music, a repeated vocal hook, and a compact slogan so that the brand could remain recognizable across different advertisements and countries.