Justin Timberlake appeared on the original 2003 recording associated with McDonald’s “I’m Lovin’ It” campaign.
The recording helped give the campaign a musical identity that could travel across markets. Timberlake provided the vocals heard in the associated song, while the wider creative and production work involved The Neptunes and Pharrell Williams. The campaign’s phrase became McDonald’s global branding line.
Pharrell Williams is a common alternative answer because he was involved in writing and production. He also performed versions connected with the campaign, but the original recording associated with the launch is generally identified with Timberlake.
The campaign began in Munich, Germany, in 2003 and was then adapted internationally. Its combination of a short phrase, a musical hook, and consistent visual styling made it one of McDonald’s most durable modern branding efforts.