Which artist recorded the vocals for the 2003 McDonald's “I'm Lovin' It” campaign song?

Justin Timberlake recorded the vocals for the 2003 McDonald's “I'm Lovin' It” campaign song.

The campaign launched in 2003 and used a pop-oriented song to give McDonald's branding a recognizable musical identity. Timberlake recorded the vocals for the song, helping connect the advertising campaign with contemporary popular music and his profile as a solo performer.

The campaign's audio hook was also associated with the phrase “ba da ba ba ba,” which became a recurring part of McDonald's advertising. The music and slogan were developed as parts of one international branding effort rather than as an unrelated commercial jingle.

A common mix-up is crediting Pharrell Williams because he was involved in the song's writing and production. Timberlake is the vocalist associated with the recorded campaign performance, while Williams was among the creative contributors behind the music.