Which singer appeared in the 2003 music video linked to McDonald's “I'm Lovin' It” campaign?

Justin Timberlake appeared in the 2003 music video linked to McDonald's “I'm Lovin' It” campaign.

The campaign introduced a slogan and a musical identity that McDonald's used internationally. Timberlake was featured in a promotional video for the song associated with the campaign, helping connect the advertising platform with contemporary pop music and a younger audience.

The campaign's best-known audio element is the “ba da ba ba ba” hook. It became a recurring part of McDonald's advertising even when the full song or celebrity appearance was not used. The brand therefore became associated with both a spoken slogan and a short musical signature.

Timberlake is sometimes incorrectly credited as the sole creator of the campaign or its hook. The advertising platform involved McDonald's, agencies, and musicians, while Timberlake's role was as a featured performer in the related promotional material. The campaign itself launched in 2003.