Which singer performed the vocal on McDonald's “I'm lovin' it” campaign jingle?

Justin Timberlake performed the vocal on McDonald's “I'm lovin' it” campaign jingle.

McDonald's launched the “I'm lovin' it” campaign in 2003, and Timberlake's vocal performance helped connect the advertising identity with contemporary pop music. The campaign used the phrase and melody across international marketing, giving the brand a consistent audio signature as well as a visual one.

The jingle is sometimes confused with the separate musicians and producers associated with the campaign's creation. Timberlake's role was the recognizable vocal performance, while the slogan itself became McDonald's corporate advertising line. The campaign was broader than a single commercial or recording: it was a worldwide branding platform spanning television, radio, packaging, and other media.