Even though she matured a lot during the past 3 years and 7 months, Sunmi still kept her famous '4-D' personality. She also went barefoot to dance to "24 Hours" and shared behind-the-scenes stories of J.Y. Park's hilarious ways of getting her to express emotion in the studio.

Watch Sunmi's first solo video interview, and take a look at the photos released on Naver Music!

SEE ALSO: Sunmi kicks off her solo debut with '24 Hours' MV