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Musician Yo-Yo Ma, singers Trisha Yearwood and Sara Bareilles answered questions during a performance watched by first lady Michelle Obama and the other spouses of the visiting G-20 leaders at the CAPA School on September 25, 2009 in Pittsburgh, Pennsylvania. U.S. President Barack Obama and heads of state from the world’s leading economic powers are meeting for the second day of the G-20 summit, aimed at promoting economic growth.

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Country superstar Trisha Yearwood sang “How Will I Live” and singer songwriter Sara Bareilles belted out her popular hit “Love Song.” Cellist Yo-Yo Ma also performed and was joined by a CAPA junior playing the marimba.

Photo: Jeff Swensen/Getty Images - Life.com