So Good (EP)

So Good (stylized as SO GOOD) is the seventh extended play by South Korean girl group T-ara. It was released on August 4, 2015 by MBK Entertainment.

Release
On July, 2015, it was revealed that the group would be returning with a new album the following month and that the group are ready for their Chinese promotions and that they have been starting to work on their new Chinese album since the start of the year.

On August 4, the girls promoted their comeback with the single "So Crazy". On August 12, the group started their promotions in China with the song "So Crazy (Chinese Version)" and also released a music video.

Reception
So Crazy received generally positive reviews from critics, specifically, the project's concepts and outfits were seen as revolutionary and were selected by several critics as a defining fashion moment. In 2019, Glamour UK included So Crazy sailor outfits as one of the greatest fashion moments in K-Pop history that helped change the fashion industry forever.

Commercial performance
So Good sold more than 8,000 on its first day of release according to Hanteo. It debuted at number 5 on the Gaon Album Chart, on the chart issue dated August 9–15, 2015. In its second week, the EP peaked at number 4. The EP entered at number 8 on the chart for the month of August 2015, with 20,629 physical copies. The EP sold 20,695 physical copies in 2015, placing at number 74 for the year-end chart.

So Crazy was a huge success in China, topping YinYueTai, the country's largest video streaming platform. The song also holds the record for the first and T-ara as the only Korean girl group to achieve a perfect 100% score on the said chart. The song peaked at 33 in South Korea and sold over 100,000 copies in the country.

Track listing
Digital download