IOI's Jeon So Mi proved her popularity on 'Hello'! 

The November 21 installment of KBS2 'Hello' was a special 300th episode, and star guests like Shim Hyun Tak, Lee Sang Woo, Seo In Young, and Jeon So Mi donated their treasured items for an auction. 

Jeon So Mi brought her taekwondo uniform and sneakers that she wore in elementary school. She explained, "I was overweight in elementary school. That's why I started taekwondo, and I've been doing it for 8 years." 

She also shared, "When IOI promotions are over, I am going to try for 4 dan (taekwondo rank)." 

SEE ALSO: Fans express frustration over Jeon So Mi's lack of activities over the past 7 years

Jeon So Mi's uniform brought a lot of competition among fans. The MC added to the competition by commenting, "If you own an item from Jeon So Mi, who won first place in a competition program, you will have good luck." 

In the end, Jeon So Mi's uniform and sneakers were won by a bidder who bid 700,000 KRW (~$600), the highest bid of the day!