Which singer recorded the vocals for McDonald’s “I’m Lovin’ It” promotional song in 2003?

Justin Timberlake recorded the vocals for McDonald’s “I’m Lovin’ It” promotional song in 2003.

The song was part of McDonald’s global branding campaign of the same name. Timberlake’s vocals helped give the campaign a contemporary pop identity, and he also appeared in a related promotional music video.

The campaign’s musical material was developed with contributions from producer Pharrell Williams and songwriter Pusha T, while the advertising concept came from the German agency Heye & Partner. These different roles are why several names are associated with the campaign.

Timberlake’s involvement did not mean that he wrote the entire campaign or owned the slogan. He was the prominent recording artist attached to the promotional song and its early marketing.