On April 26th, A Pink's official Twitter posted a picture of member Kim Nam Joo and CNBLUE's Jung Shin. They tweeted, "The truth behind A Pink's 'Music Core' debut day.�New girl group member 'K' is actually Jung Shin's little sister?!!!�Beautiful looks!! Do you think they look alike?" Taken backstage of MBC's waiting room, the two can be seen posing with victory signs.�Surprisingly, netizens felt that their close resemblance made them look like siblings. Netizens commented, "They look totally alike!", "They look close, have they always known each other?", and "Could be his sister." Source: Newsen via Nate