A dispute between the Belgian fashion designer Benjamin Voortmans and K-pop star Jisoo of Blackpink over loaned clothes for a photo shoot magnified what happens when fandoms support their celebrities.

The designer behind the Judassime label called out the 31-year-old musician earlier this week due to designs that her team had borrowed several months ago had not yet been returned. Voortmans said he flagged her name initially “because she was the boss of the whole thing. Of course, I did not know everybody on the team. And the response was not clear for months and months.…