Which singer performed the vocals on McDonald’s “I’m Lovin’ It” promotional song?

Justin Timberlake performed the vocals on McDonald’s “I’m Lovin’ It” promotional song.

The song was developed for the campaign that McDonald’s introduced in 2003. Timberlake’s vocal performance helped connect the advertising platform with contemporary pop music, while the short “ba da ba ba ba” hook became the campaign’s most recognizable audio element.

A common mix-up is crediting the entire song to Timberlake alone. The campaign involved multiple writers, producers, and music-industry collaborators, and the advertising version was shaped specifically for McDonald’s branding.

The singer’s involvement was part of a broader strategy: McDonald’s used music, celebrities, and a repeatable sonic identity to make the phrase memorable across television, radio, and later digital advertising.