Marvin & Tammi at Expo ’67

Among the biggest names of the era were the soul music acts that performed, including Motown stars Marvin Gaye and Tammi Terrell.  At one point before their evening stage performance, the couple were quietly escorted to a undisclosed location.  During a rainy afternoon at the fair, Marvin and Tammi were filmed together singing to their monster hit, "Ain't No Mountain High Enough" while huddled together under one of the fair's modernistic telephone booths that featured a plastic umbrella above.