Fans mourn death of K-pop star, Jonghyun struggles with depression

Jonghyun was one of the most talented and well-rounded artists in K-pop, said Paul Han, co-founder of allkpop, a site for K-pop gossip and news, which has 10 million monthly readers worldwide. "He had a wonderful voice and was so versatile and composed beautiful music. He was an even better person and he will be forever missed. The world of K-pop has lost one of its brightest stars," he said.

Earlier this year, the group went on a world tour that took in the US and released their fifth album, titled Five. Jonghyun had performed as a solo artist as recently as this month. "We've come to the US for fan meets before, but concerts make me a bit more nervous and excited. I hope our fans will be able to make great memories with us through the music and performances we show on stage," Jonghyun told CNN in May after performing in Dallas, Los Angeles and Canada.