Which singer provided lead vocals for the McDonald's “I'm Lovin' It” jingle?

Justin Timberlake provided lead vocals for the McDonald's “I'm Lovin' It” jingle.

The jingle was part of McDonald's global advertising campaign launched in 2003. Timberlake's recording helped connect the campaign with contemporary pop music and gave the slogan a recognizable musical identity beyond ordinary spoken advertising.

The campaign involved several music-industry figures. Pharrell Williams was involved in writing and production, while the German group Tomatito contributed to the earlier song project associated with the campaign. These overlapping credits are why the vocal credit is sometimes attributed incorrectly.

Timberlake's participation did not mean that “I'm Lovin' It” was released as a conventional solo pop single under his name. Its primary purpose was commercial branding: a short, repeatable musical hook that could be adapted for McDonald's advertisements in many countries.