I loved the 7-Up commercials. They were goofy and mostly clever variations of KT songs. I don't know about the DQ ads - I have a vague memory of them from the day. But I do recall discussing the ads the Bros. did for some cigarette brand (Marlboro?) It caused them all to start smoking, altho they all ultimately quit - I think. John was still smoking when I sang with him. Maybe somebody can hunt those ads up.