May 2015 produced 16 #1s across six music shows, shared by 5 artists and 5 songs.
The most wins went to BigBang (5), followed by BTS (4) and Shinee (4).
The most-awarded song was “Loser” by Big Bang with 5 wins on 5 shows, then “I Need U” with 4.
Songs that swept five or more shows: “Loser”.
First-ever music show wins went to BTS, Kim Sung-kyu — 2 artists in total.
Counts are recomputed every morning from each show's published results (Wikipedia lists, CC BY-SA). Weeks without a broadcast or record are shown in grey; dates open episode pages.
| Date | Show | Song · Artist |
|---|---|---|
| 2015-05-05 | The Show | I Need UBTS |
| 2015-05-07 | M Countdown | I Need UBTS |
| 2015-05-08 | Music Bank | I Need UBTS |
| 2015-05-09 | Show! Music Core | LoserBigBang |
| 2015-05-10 | Inkigayo | LoserBigBang |
| 2015-05-13 | Show Champion | I Need UBTS |
| 2015-05-14 | M Countdown | LoserBigBang |
| 2015-05-15 | Music Bank | LoserBigBang |
| 2015-05-19 | The Show | The AnswerKim Sung-kyu |
| 2015-05-20 | Show Champion | LoserBigBang |
| 2015-05-23 | Show! Music Core | The AnswerKim Sung-kyu |
| 2015-05-26 | The Show | EOEO— |
| 2015-05-27 | Show Champion | ViewShinee |
| 2015-05-28 | M Countdown | ViewShinee |
| 2015-05-29 | Music Bank | ViewShinee |
| 2015-05-31 | Inkigayo | ViewShinee |