The #1 on M Countdown on 2012-11-08 was “1,2,3,4” by Lee Hi — win No. 1 for the song and career win No. 1 for Lee Hi (No. 1 on this show).
“1,2,3,4” has 1 music show wins in total: 2012-11-08 M Countdown. Lee Hi had 1 wins in 2012 up to this date, and this was the artist's first win on M Countdown. The previous week's M Countdown #1 was “Please Don't...” by K.Will. Episode data comes from broadcasters' published results (Wikipedia lists, CC BY-SA) and is recounted daily.