Girl group Apink Son Na-eun poses at the photo event of Mnet 'M Countdown' held at Sangam-dong CJ E & M Center in Mapo-gu, Seoul on the afternoon of the 17th.
About Apink
Apink is a South Korean girl group formed by IST Entertainment. The group debuted on April 19, 2011, with the extended play Seven Springs of Apink.
 Wikipedia