Which five-note musical signature became part of McDonald’s “I’m Lovin’ It” branding?

“ba da ba ba ba” is the five-note musical signature used in McDonald’s “I’m Lovin’ It” branding.

The short vocal melody appears at the end of many McDonald’s advertisements and works as an audio logo. It gives the campaign an immediately recognizable sound even when the full slogan is not spoken. The phrase is commonly written in several informal spellings, but “ba da ba ba ba” is the familiar representation.

The musical signature is not the same thing as the slogan. “I’m Lovin’ It” is the verbal campaign line, while the five-note phrase is its sonic identifier. The campaign launched globally in 2003 and used both elements together.

Because the melody is often sung rather than written, descriptions can vary slightly in punctuation and capitalization. The underlying five-note signature, however, is the stable branding fact associated with the campaign.