Her photos from high school are going viral due to the drastic difference in her looks. 

Netizens expressed amazement, and commented, "Hul... Han Chae Ah...", "Wow, plastic surgery went really well for Han Chae Ah", "I thought she said she couldn't even step outside of the classroom because she was so pretty.. wtf", "I don't think I would've recognized her if it didn't say her name TT", "Wow, I feel betrayed", and more. 

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Check out her pre-debut photos yourself below.