John Legend performed a special show for KCRW fans at Apogee in Santa Monica, Calif.
Mavis Staples performs at the 2014 Newport Folk Festival.
Adam Kissick for NPR
The Foreign Exchange performs at the Tiny Desk in May 2014.
Meredith Rizzo/Meredith Rizzo/NPR
The Blind Boys of Alabama.
Brian Blauser/Mountain Stage