IU gets a certified all-kill with pre-release 'Through the Night'
A certified all-kill happens when a song is #1 on all major real-time and daily charts, as well asinstiz's realtime iChart. To achieve a perfect all-kill you must be #1 on all of that plus instiz's Weekly iChart. It appears IU won't be achieving a perfect all-kill this week as the song was released later in the week but she has a good chance to achieve it next week!
Congratulations IU!