AP Photo/Matt Rourke
Former U.S. Secretary of State Condoleezza Rice, left at piano, and Aretha Franklin perform at The Mann Center for the Performing Arts in Philadelphia, Tuesday, July 27, 2010.
AP Photo/Matt Rourke
Former U.S. Secretary of State Condoleezza Rice performs Mozart's piano concerto in D Minor with The Philadelphia Orchestra The Mann Center for the Performing Arts in Philadelphia, Tuesday, July 27, 2010.
AP Photo/Matt Rourke
Former U.S. Secretary of State Condoleezza Rice, left, is acknowledged by Aretha Franklin after they performed a song at The Mann Center for the Performing Arts in Philadelphia, Tuesday, July 27, 2010.
Jeff Fusco/Getty Images
Aretha Franklin performs with the Philadelphia Orchestra at the Mann Center for Performing Arts on July 27, 2010, in Philadelphia.
Jeff Fusco/Getty Images
Former US Secretary of State Condoleezza Rice performs with the Philadelphia Orchestra at the Mann Center for Performing Arts on July 27, 2010, in Philadelphia, Pennsylvania.
AP Photo/Matt Rourk
Former U.S. Secretary of State Condoleezza Rice and Aretha Franklin greet the crowd after they performed their second song together at The Mann Center for the Performing Arts in Philadelphia, Tuesday, July 27, 2010.
AP Photo/Matt Rourke
Former U.S. Secretary of State Condoleezza Rice, left, and Aretha Franklin meet before they perform together at The Mann Center for the Performing Arts in Philadelphia, Tuesday, July 27, 2010.
AP Photo/Matt Rourke
Former U.S. secretary of state Condoleezza Rice and Aretha Franklin pose after they performed their first song together at The Mann Center for the Performing Arts in Philadelphia, Tuesday, July 27, 2010.
Jeff Fusco/Getty Images
Aretha Franklin, right, and Ron Isley perform with the Philadelphia Orchestra at the Mann Center for Performing Arts on July 27, 2010, in Philadelphia.
