Which singer appeared on the 2003 recording associated with McDonald's 'I'm Lovin' It' launch?

Justin Timberlake appeared on the 2003 recording associated with McDonald’s “I’m Lovin’ It” launch. His vocal performance helped connect the global advertising campaign with contemporary pop music.

The campaign used a song and a short jingle rather than relying only on a spoken slogan. Timberlake’s involvement was part of the launch strategy, while the phrase and sonic tag were adapted for McDonald’s markets worldwide.

Timberlake did not create the Golden Arches or the slogan’s advertising concept; those belong to McDonald’s marketing partners. The recording is also distinct from later celebrity collaborations and from songs merely licensed for individual commercials.