Looks Can Kill

In the Korean comments

One comment reads, in translation, “This is the first time I’ve seen Gaeul look like this... not an innocent squirrel, but a chic squirrel,” using the same cute animal image to emphasize her switch from innocent to chic. Another specifically praises the performance comparison: “Gaeul sunbae dances even more powerfully than the male idol next to her.”

What the words mean

찰떡 (chaltteok, literally “sticky rice cake”) is casual slang for a perfect match. The comment saying the song and Gaeul are 찰떡 (chaltteok, a perfect fit) means her performance suits the track exceptionally well.