 Complete the following phrase:  As the 1960s came to an end, Ike and Tina began performing at rock festivals. In 1969 they performed at the Newport Pop Festival in Northridge and the Gold Rush Festival at Lake Amador. In October, they headlined the Soul Bowl at Tulane Universitys Sugar Bowl Stadium; a concert to raise money for disadvantaged minority students. In November, Ike and Tina reportedly upstaged the Rolling Stones as the opening act on their 