(From 2nd L to R) Canadian singer Nikki Yanofsky, nine-year old U.S. pianist and composer Emily Bear, U.S. singer Patti Austin and U.S. jazz bassist and singer Esperanza Spalding are introduced by U.S. music producer Quincy Jones (L) for a "all girls" jam session at the 45th Montreux Jazz Festival July 13, 2011. Over 350 artists and groups will perform on the two main stages and at the 10 free venues during the sixteen-day long festival. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: ENTERTAINMENT)