The #1 on Inkigayo on 2015-09-20 was “Dumb Dumb” by Red Velvet — win No. 4 for the song and career win No. 10 for Red Velvet (No. 2 on this show). It also won The Show, Show Champion, M Countdown the same week (4 crowns).
“Dumb Dumb” has 4 music show wins in total: 2015-09-15 The Show, 2015-09-16 Show Champion, 2015-09-17 M Countdown, 2015-09-20 Inkigayo. Red Velvet had 10 wins in 2015 up to this date, and this was win No. 2 on Inkigayo. The previous week's Inkigayo #1 was “Lion Heart” by Girls' Generation. The other shows that week went to Show! Music Core: “Lion Heart” by Girls' Generation. Episode data comes from broadcasters' published results (Wikipedia lists, CC BY-SA) and is recounted daily.
| Date | Show | Song · Artist | |
|---|---|---|---|
| 2015-09-15 | The Show | Dumb DumbRed Velvet | ★ #1 |
| 2015-09-16 | Show Champion | Dumb DumbRed Velvet | ★ #1 |
| 2015-09-17 | M Countdown | Dumb DumbRed Velvet | ★ #1 |
| 2015-09-19 | Show! Music Core | Lion HeartGirls' Generation | ★ #1 |
| 2015-09-20 | Inkigayo | Dumb DumbRed Velvet | ★ #1 |