Served up to highlight McDonald's image as a spotless, family-friendly chain, this exuberant fast-food homage to a Busby Berkeley musical also debuted the chain's new theme song, "You Deserve a Break Today," later sung (but not written) by Barry Manilow. The ad—featuring a pre-Good Times John Amos and a pre-Happy Days Anson Williams—recharged a hackneyed genre with a sweet naivete rare in commercials.