The #1 on M Countdown on 2016-08-18 was “Whatta Man” by I.O.I — win No. 3 for the song and career win No. 3 for I.O.I (No. 1 on this show). It also won The Show, Show Champion, Music Bank the same week (4 crowns).
“Whatta Man” has 5 music show wins in total: 2016-08-16 The Show, 2016-08-17 Show Champion, 2016-08-18 M Countdown, 2016-08-19 Music Bank, 2016-08-30 The Show. I.O.I had 3 wins in 2016 up to this date, and this was the artist's first win on M Countdown. The previous week's M Countdown #1 was “How's This?” by Hyuna. The other shows that week went to Inkigayo: “Whistle” by Blackpink. Episode data comes from broadcasters' published results (Wikipedia lists, CC BY-SA) and is recounted daily.
| Date | Show | Song · Artist | |
|---|---|---|---|
| 2016-08-16 | The Show | Whatta ManI.O.I | ★ #1 |
| 2016-08-17 | Show Champion | Whatta ManI.O.I | ★ #1 |
| 2016-08-18 | M Countdown | Whatta ManI.O.I | ★ #1 |
| 2016-08-19 | Music Bank | Whatta ManI.O.I | ★ #1 |
| 2016-08-21 | Inkigayo | WhistleBlackpink | ★ #1 |