[2] Songs that spend three weeks at number one are awarded a Triple Crown and are removed from the chart and ineligible to win again.
In 2019, 36 singles ranked number one on the chart and 28 music acts received award trophies for this feat.
The following week, former I.O.I member Chungha ranked number one on the chart for the first time with her single "Gotta Go".
Two other soloists had more than one number one single in 2019: Taeyeon, with "Four Seasons" and "Spark", and IU, with "Love Poem" and "Blueming".
[11][12] X1, formed through the fourth season of Produce 101, gained their first number one on the chart with their debut single "Flash" on September 8.
[15] Other first-time number ones on the chart include Seventeen with "Home" in February and NU'EST with "Love Me" in November.