Which singer performed the vocals on the full version of McDonald’s “I’m Lovin’ It” theme?

Justin Timberlake performed the vocals on the full version of McDonald’s “I’m Lovin’ It” theme.

The campaign launched internationally in 2003 and used a song produced by The Neptunes, the production team associated with Pharrell Williams and Chad Hugo. Timberlake recorded the vocal performance, helping the advertising theme function as a recognizable pop-oriented brand sound.

The campaign’s famous “ba da ba ba ba” vocal hook is often associated with the commercial itself rather than with a conventional standalone pop single. That distinction can lead people to credit the producer or another artist instead of Timberlake.

“I’m Lovin’ It” became one of McDonald’s most enduring global marketing platforms, linking a short musical phrase with the company’s visual identity and international advertising.