An idol's alleged ex-girlfriend is causing a stir after revealing his mistreatment of her on 'Unpredictable Fortunetellers'.

In a recent preview for the KBS Joy show, a guest reveals she met her ex-boyfriend through a blind date app and dated for 3 years. She then shocked the hosts by saying her ex-boyfriend was none other than "idol singer XX."

According to the alleged ex-girlfriend, she spent millions of won to support him during his idol training period and also signed a contract to keep their relationship a secret. She further revealed she was now raising 6 dogs alone after he dumped her.  

Netizens have been speculating who the idol may be, commenting, "It's probably an idol who's not very famous," "I think fans will figure it out," and more.

Stay tuned for updates.