Which musician recorded the original vocal version of McDonald's “I'm Lovin' It” jingle?

Justin Timberlake recorded the original vocal version of McDonald's “I'm Lovin' It” jingle.

Timberlake recorded a full song connected with the 2003 McDonald's campaign, while the shorter musical hook became the part most widely associated with the brand. The campaign used the phrase and melody across advertising in multiple markets, helping McDonald's establish a consistent modern sound.

The jingle is often attributed solely to the advertising agency or to producer Pharrell Williams. Pharrell was involved in the song's production, but Justin Timberlake supplied the prominent vocal performance on the original recording associated with the campaign.

This collaboration showed how McDonald's branding had expanded beyond logos and slogans. Music, celebrity participation, and a repeatable sonic signature all worked together to make the campaign memorable. The “I'm Lovin' It” phrase eventually became more recognizable than the original full-length song.