Colombian singer Juanes warms up during a sound check before his concert in Washington, Thursday, July 26, 2012. (AP Photo/Jacquelyn Martin)

Associated Press
Colombian singer Juanes warms up during a sound check before his concert in Washington, Thursday, July 26, 2012. (AP Photo/Jacquelyn Martin)
Colombian singer Juanes warms up during a sound check before his concert in Washington, Thursday, July 26, 2012. (AP Photo/Jacquelyn Martin)
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