Taking over Kim Woo Bin’s spot, Ahn Jae Hyeon and Jung Joon Young have been named the new MCs of Mnet’s M COUNTDOWN. Mnet announced on February 24 that Ahn Jae Hyeon and Jung Joon Young will be the new MCs starting February 27’s broadcast. Both Jung Joon Young and Ahn Jae Hyeon have past MC experiences for radio and…