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The Inkigayo Chart is a music programrecord chart that gives an award to the best-performing single of the week in South Korea. In 2018, the chart measured digital performance in domestic online music services (5,500 points), social media via YouTube views (3,500 points), network on-air time (1,000 points), advanced viewer votes (500 points), and album sales (500 points) in its ranking methodology. Songs that spend three weeks at number one are awarded a Triple Crown and are removed from the chart and ineligible to win again. Got7 member Park Jin-young, Blackpink member Jisoo and NCT member Doyoung had hosted the show since February 5, 2017, and continued to do so until February 4, 2018. Actor Song Kang, Seventeen member Mingyu and DIA member Jung Chae-yeon were announced as new hosts from the February 18 broadcast. Kang left the show on November 4.
In 2018, there were 30 singles that ranked number one on the chart and 21 music acts received award trophies for this feat. Out of the 30 songs, 10 collected trophies for three weeks and earned a Triple Crown: Twice's "Heart Shaker", "What Is Love?", and "Dance the Night Away"; iKon's "Love Scenario"; Mamamoo's "Starry Night"; BTS's "Fake Love" and "Idol"; Blackpink's "Ddu-Du Ddu-Du"; IU's "Bbibbi"; and Jennie's "Solo". Six artists ranked more than one single at number one in 2018. Former Wonder Girls member Sunmi was the only soloist to have more than one chart-topper in 2018 with "Heroine" and "Siren" from her album Warning. Three boy groups ranked two singles at number one in 2018: iKon with "Love Scenario" and "Goodbye Road", Winner with "Everyday" and "Millions", and BTS with "Fake Love" and "Idol". Both singles by BTS ranked number one for three consecutive weeks each and achieved a triple crown. Their single "Fake Love" achieved 10,918 points on the June 3 broadcast making it the single with the highest score of the year. iKon's third consecutive win with "Love Scenario" granted the group their first Triple Crown since their debut.
Red Velvet had three singles rank number one on the chart: "Peek-a-Boo", "Bad Boy" and "Power Up". Meanwhile, girl group Twice ranked four singles at number one on the chart in 2018 with "Heart Shaker", "What Is Love?", "Dance the Night Away", and "Yes or Yes". The former three singles ranked number one for three weeks on the chart and achieved a triple crown. The four songs spent a total of eight weeks atop the chart making them the act with the most wins of the year. Three soloists ranked number one on the chart for the first time in 2018. Musician Paul Kim earned his first award with "Me After You" despite a lack of promotional activities on music shows. Blackpink member Jennie made her debut performance as a soloist on the November 25 broadcast of Inkigayo, where she won her first music show award with "Solo". Upon topping the ranking with "180 Degree", soloist Ben won her first music show award over nine years after her debut.
Kim, Ha-jin (September 16, 2018). 방탄소년단, '인기가요' 1위...트리플 크라운 달성. 10asia (in Korean). Korea Entertainment Media. Archived from the original on April 4, 2019. Retrieved April 28, 2019.
1월 둘째 주 인기가요 차트 [Inkigayo chart for the second week of January] (in Korean). Seoul Broadcasting System. January 23, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
1월 넷째 주 인기가요 차트 [Inkigayo chart for the fourth week of January] (in Korean). Seoul Broadcasting System. February 6, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
2월 첫째 주 인기가요 차트 [Inkigayo chart for the first week of February] (in Korean). Seoul Broadcasting System. February 6, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
2월 둘째 주 인기가요 차트 [Inkigayo chart for the second week of February] (in Korean). Seoul Broadcasting System. February 11, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
2월 셋째 주 인기가요 차트 [Inkigayo chart for the third week of February] (in Korean). Seoul Broadcasting System. February 27, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
2월 넷째 주 인기가요 차트 [Inkigayo chart for the fourth week of February] (in Korean). Seoul Broadcasting System. February 27, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
8월 둘째 주 인기가요 차트 [Inkigayo chart for the second week of August] (in Korean). Seoul Broadcasting System. August 19, 2018. Archived from the original on August 19, 2018. Retrieved April 28, 2019.
8월 셋째 주 인기가요 차트 [Inkigayo chart for the third week of August] (in Korean). Seoul Broadcasting System. August 19, 2018. Archived from the original on December 13, 2020. Retrieved April 28, 2019.
8월 넷째 주 인기가요 차트 [Inkigayo chart for the fourth week of August] (in Korean). Seoul Broadcasting System. August 29, 2018. Archived from the original on January 1, 2021. Retrieved April 28, 2019.
9월 첫째 주 인기가요 차트 [Inkigayo chart for the first week of September] (in Korean). Seoul Broadcasting System. September 5, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
9월 둘째 주 인기가요 차트 [Inkigayo chart for the second week of September] (in Korean). Seoul Broadcasting System. September 18, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
9월 셋째 주 인기가요 차트 [Inkigayo chart for the third week of September] (in Korean). Seoul Broadcasting System. September 19, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
9월 넷째 주 인기가요 차트 [Inkigayo chart for the fourth week of September] (in Korean). Seoul Broadcasting System. October 10, 2018. Archived from the original on June 13, 2020. Retrieved April 28, 2019.
9월 다섯째 주 인기가요 차트 [Inkigayo chart for the fifth week of September] (in Korean). Seoul Broadcasting System. October 10, 2018. Archived from the original on August 13, 2022. Retrieved April 28, 2019.
11월 셋째 주 인기가요 차트 [Inkigayo chart for the third week of November] (in Korean). Seoul Broadcasting System. November 18, 2018. Archived from the original on November 18, 2018. Retrieved April 28, 2019.