The #1 on M Countdown on 2018-06-14 was “Light” by Wanna One — win No. 3 for the song and career win No. 19 for Wanna One (No. 4 on this show). It also won The Show, Show Champion, Music Bank, Show! Music Core the same week (5 crowns).
“Light” has 5 music show wins in total: 2018-06-12 The Show, 2018-06-13 Show Champion, 2018-06-14 M Countdown, 2018-06-15 Music Bank, 2018-06-16 Show! Music Core. Wanna One had 9 wins in 2018 up to this date, and this was win No. 4 on M Countdown. The previous week's M Countdown #1 was “Fake Love” by BTS. The other shows that week went to Inkigayo: “Travel” by Bolbbalgan4. Episode data comes from broadcasters' published results (Wikipedia lists, CC BY-SA) and is recounted daily.
| Date | Show | Song · Artist | |
|---|---|---|---|
| 2018-06-12 | The Show | LightWanna One | ★ #1 |
| 2018-06-13 | Show Champion | LightWanna One | ★ #1 |
| 2018-06-14 | M Countdown | LightWanna One | ★ #1 |
| 2018-06-15 | Music Bank | LightWanna One | ★ #1 |
| 2018-06-16 | Show! Music Core | LightWanna One | ★ #1 |
| 2018-06-17 | Inkigayo | Travelbol4 | ★ #1 |