The #1 on M Countdown on 2012-12-20 was “Caffeine” by Yang Yo-seob — win No. 1 for the song and career win No. 1 for Yang Yo-seob (No. 1 on this show).
“Caffeine” has 2 music show wins in total: 2012-12-20 M Countdown, 2013-01-03 M Countdown. Yang Yo-seob 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 “Return” by Lee Seung-gi. The other shows that week went to Music Bank: “Gangnam Style” by Psy. Episode data comes from broadcasters' published results (Wikipedia lists, CC BY-SA) and is recounted daily.
| Date | Show | Song · Artist | |
|---|---|---|---|
| 2012-12-20 | M Countdown | CaffeineYang Yo-seob | ★ #1 |
| 2012-12-21 | Music Bank | Gangnam StylePsy | ★ #1 |