If you’re a fan of the American show Mad Men, surely you’ve seen Jessica Paré’s coquettish, crowd-rousing rendition of “Zou Bisou Bisou,” the classic Gillian Hills song. But did you know this piece of French pop is a morsel of a grander genre of French music? The 1960s saw an explosion of bubblegum pop called yé-yé (so named for ecstatic shouts during the songs’ performances), which put a French twist on the British mod movement and American go-go dancers of the time, propelled mostly by the lyrics of one Serge Gainsbourg....