Over sixty years ago, the Chicago-based advertising agency Energy BBDO wrote the classic jingle for Wrigley’s Doublemint gum. A 1959 commercial introduced the refrain “Double your pleasure, double your fun,” and the identical Doublemint Twins; both would remain a mainstay of the gum’s advertising for decades. The sets of twins changed over the years, but the song proved so durable that it became an actual Billboard hit in 2008 when, at the behest of Wrigley, R&B singer Chris Brown stealthily recorded a new take on it, called “Forever.” Crooning, “Double your pleasure, double your fun,” Brown took the updated version all the way to No. 2 on the charts—almost 50 years after the original was released.