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

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

The campaign began in 2003 and introduced the phrase that became McDonald’s global advertising tagline. Timberlake recorded vocals for the jingle, while the campaign’s creative development involved the advertising agency Heye & Partner and the production team behind the song. The phrase was adapted for different markets and languages while retaining its central identity.

The campaign is notable because McDonald’s treated a short pop-style hook as a worldwide brand asset. The line appeared in television advertising, packaging, restaurant materials, and other promotional formats.

Timberlake’s involvement is sometimes confused with the artists associated with the song’s writing and production. His role here is the credited vocal performance for the advertising jingle, not ownership of the McDonald’s brand or authorship of every version used internationally.