K-Pop Singer IU Reveals She Suffered From Insomnia, Talks About Overcoming Self-Hatred KEY POINTS She also had sleepless nights IU's fifth full-length album "Lilac" came out on March 25 K-pop idol IU's personal experiences are the inspiration for her songs. The singer has revealed how her struggles with insomnia and self-hatred motivated her to write some of her most successful songs. Lee Ji-Eun, popularly known as IU, appeared as a guest on the 100th episode of the popular South Korean variety show "You Quiz on the Block" on Wednesday. The singer-turned-actress said she was a big fan of the show. "I've watched 'You Quiz' so much. Even if I miss the show when it first airs, I watch the rerun. I also watched the BTS episode that recorded the highest ratings," she said, according to Soompi.