Which singer recorded the vocal version of McDonald's “I'm Lovin' It” theme in 2003?

Justin Timberlake recorded the vocal version of McDonald's “I'm Lovin' It” theme in 2003.

The recording was part of McDonald's global campaign launched that year. Timberlake's vocal track helped connect the advertising phrase to contemporary pop music, while the short “ba da ba ba ba” motif became the campaign's most enduring audio signature.

The campaign's musical credits can cause confusion because the jingle and the full promotional song involved several contributors. The phrase itself was developed for advertising, and the campaign was produced through international marketing work rather than being a conventional Timberlake single released under his own name.

McDonald's used the campaign to create a consistent sound as well as a consistent slogan. That combination made the words and melody recognizable even when advertisements differed by country, language, menu, or cast.