It turns out she had an amazing surprise birthday party with her family that day, and she took to her Instagram to share some moments from that party with her fans. 

On March 21, Jeon So Mi wrote, "+flashback+ I live for my birthday D-355. 355 days to go. The photos only came out today. YES Im crying because I had a surprise birthday cake exactly at 03. 09 12am," alongside a series of gorgeous developed photos of her and her family. 

Did you wish Jeon So Mi a happy birthday earlier this month?

+flashback+ I live for my birthday D-355. 355days to go ??? ?? ???? YES Im crying because I had a surprise birthday cake exactly at 03. 09 12am

A post shared by Somsomi (@somsomi0309) on Mar 20, 2018 at 7:02am PDT