What phrase formed the musical signature of McDonald's “I'm lovin' it” campaign?

“Ba da ba ba ba” formed the musical signature of McDonald's “I'm lovin' it” campaign.

The short vocal phrase was paired with the slogan when McDonald's launched the global campaign in 2003. Its compact rhythm made it easy to recognize even when an advertisement was heard or seen only briefly, helping the campaign function as an audio brand as well as a visual one.

The phrase is often remembered as a tune rather than as text, so spelling and punctuation can vary in informal references. The canonical advertising phrase is commonly written “ba da ba ba ba.”

This musical signature belongs specifically to the 2003 campaign. It should not be confused with earlier McDonald's jingles, including the advertising associated with “You Deserve a Break Today,” which represented a different era of the brand.