The #1 on Music Bank on 2018-09-21 was “Siren” by Sunmi — win No. 3 for the song and career win No. 11 for Sunmi (No. 1 on this show). It also won Show Champion, Show! Music Core, Inkigayo the same week (4 crowns).
“Siren” has 5 music show wins in total: 2018-09-13 M Countdown, 2018-09-19 Show Champion, 2018-09-21 Music Bank, 2018-09-22 Show! Music Core, 2018-09-23 Inkigayo. Sunmi had 6 wins in 2018 up to this date, and this was the artist's first win on Music Bank. The previous week's Music Bank #1 was “Idol” by BTS. The other shows that week went to The Show: “Remember Me” by Oh My Girl. Episode data comes from broadcasters' published results (Wikipedia lists, CC BY-SA) and is recounted daily.
| Date | Show | Song · Artist | |
|---|---|---|---|
| 2018-09-18 | The Show | Remember MeOh My Girl | ★ #1 |
| 2018-09-19 | Show Champion | SirenSunmi | ★ #1 |
| 2018-09-21 | Music Bank | SirenSunmi | ★ #1 |
| 2018-09-22 | Show! Music Core | SirenSunmi | ★ #1 |
| 2018-09-23 | Inkigayo | SirenSunmi | ★ #1 |