SEE ALSO: NBC shares heartbreaking past interview with Korean-American figure skater Jinna Han, who passed away in the recent DC plane crash

Former EXO member Luhan

"I can't believe it. Rest in peace. You were the best vocal."

Former EXO member Tao

"I can't believe it... The first time I went to Korea, the weather was very cold then. The first time I went to a broadcast station, I heard the song 'Hot Times' for the first time. It left such a beautiful memory. Because of that stage, that song, I wanted to so quickly go onto the stage myself and wanted to start practicing. Thank you for being my strength. Hyung, you were the first sunbaenim I've met in Korea. Right now my feelings are just... impossible to describe."

Park Ji Min 

"Please I can't believe it still. Rest in peace.

2PM's Jun.K

"My heart aches so bad. There must've been so many concerns and pain behind the brightness. Hope he rests in peace.."

2PM's Nichkhun

"Rest in peace."

2PM's Junho

"I can't believe this. I don't want to believe this.."

DAY6's Jae

"As one of my first Korean influences, my heart aches for this tragedy. From the bottom of my heart, may he rest in peace."

"Sigh.... I heard the news just now. As a person who was one of his colleagues, I hope Jonghyun rests in peace.... Heavy mind..."

CNBLUE's Jonghyun

A post shared by ??? (@cnbluegt) on Dec 18, 2017 at 5:53am PST

"What has been going on with you all this time... Dude..."

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A post shared by Choi Jong Hun ??? (@ftgtjhc) on Dec 18, 2017 at 5:16am PST

"Hyung....

?....

A post shared by ?? ? (@minhwan12) on Dec 18, 2017 at 6:54am PST

If you or someone you know is at risk of self-harm or suicide, seek help as soon as possible by contacting agencies specializing in crisis intervention and suicide prevention in the United States and abroad.