South Korean singer Wheesung, best known for his songs like Insomnia, With Me, Even Thought Of Marriage and Can't We, has passed away at the age of 43. He was discovered dead at his residence in Seoul, police said on Monday. He was scheduled to perform along with ballad singer KCM in Daegu on March 15. His talent agency has requested fans to stay clear of any unverified rumours or speculative reports.