K-pop star Lee Ji Han was among 158 people killed in the Itaewon swarm in Seoul, South Korea on October 29.
He rose to fame after taking part in the second season of Produce 101, a popular reality show.
In an exclusive interview with the BBC, his mother spoke about the pain of losing her son and what she expects next from the government.
Video of BBC Korean’s Woongbee Lee and Jungmin Choi.
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