Which McDonald's slogan was launched in 2003 and became the chain's global tagline?

“I'm Lovin' It” was launched in 2003 as McDonald's global tagline.

McDonald's introduced the campaign in Munich, Germany, on September 2, 2003. The phrase was written with informal grammar and a distinctive apostrophe, giving the campaign a conversational tone rather than presenting a formal corporate statement.

The campaign used the “ba da ba ba ba” musical signature and appeared in more than 100 countries. Justin Timberlake recorded a vocal track for the campaign, while the production team later associated with the international rollout included Pharrell Williams and Pusha T.

The slogan followed earlier McDonald's taglines such as “You Deserve a Break Today,” which began in 1971. It is sometimes described as merely an American slogan, but McDonald's specifically developed it for worldwide use.