Billboard confirmed that the music video surpassed 17.1 million views within 24 hours of its release and broke the record for the most viewed K-pop debut music video within 24 hours.On February 21, eight days after their debut, Itzy received their first music show win on M Countdown and became the fastest girl group to achieve their first music show win."Dalla Dalla" also holds the record for the fastest K-pop debut music video to reach 100 million views.
Itzy's debut EP, titled ''It'z Icy'' was released on July 29, 2019 along with an accompanied music video for its lead single titled "'''Icy'''".On''' September 22, JYPE announced Itzy's showcase tour titled Itzy Premiere Showcase Tour "''Itzy? Itzy!''". A showcase tour kicked off in Jakarta on November 2 and then take the act to different cities in Asia throughout the end of 2019 before heading to the United States for five shows in January 2020.
In November 2019, "Dalla Dalla" surpassed 100 million streams on Gaon Music Chart, becoming the group's first platinum certification. It is also the first debut song by a K-pop group to earn a platinum certification from the Korea Music Content Association since the introduction of the certifications in April 2018.[21] The single also ranked No. 8 on the list of "The 20 Best K-pop Songs of 2019" by Dazed, which stated that the group "keep a steady hand on the rudder using the fun touches even with the visual and sonic chaos going on around" and "the ones to give K-pop a fresh boot up".The music videos of "Dalla Dalla" and "Icy" entered the list of South Korea's most popular music video on YouTube, at No. 2 and 7 respectively.At the end of the year, Itzy was recognized with several Best New Female Artist awards, including the 2019 Melon Music Awards and the 2019 Mnet Asian Music Awards.
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