Krystal Jung Accepts 5th First Place On M! Countdown For '4 Walls'

The Inquisitr K-Pop Group f(x) Wins Fifth First Place On 'M! Countdown' For '4 Walls,' Showing They Are A-Okay ... The Inquisitr Krystal Jung (known simply as Krystal), the Maknae (youngest member) of f(x), accepted the first place trophy for the group in a video message.