The #1 on M Countdown on 2015-10-01 was “Lean On Me” by Soyou & Kwon Jeong Yeol — win No. 1 for the song and career win No. 1 for Soyou & Kwon Jeong Yeol (No. 1 on this show).
“Lean On Me” has 1 music show wins in total: 2015-10-01 M Countdown. Soyou & Kwon Jeong Yeol had 1 wins in 2015 up to this date, and this was the artist's first win on M Countdown. The previous week's M Countdown #1 was “Dumb Dumb” by Red Velvet. The other shows that week went to Show! Music Core: “Ordinary Love” by Park Kyung. Episode data comes from broadcasters' published results (Wikipedia lists, CC BY-SA) and is recounted daily.
| Date | Show | Song · Artist | |
|---|---|---|---|
| 2015-10-01 | M Countdown | Lean On MeSoyou & Kwon Jeong Yeol | ★ #1 |
| 2015-10-03 | Show! Music Core | Ordinary LovePark Kyung | ★ #1 |