Singer Yoon Hyun-sang is being treated in hospital and has canceled all his schedules. Capture from Instagram @hyunsangzzang

Singer Yoon Hyun-sang has canceled all schedules after being hospitalized due to severe fever and vomiting.

His agency, MUN HWA IN, revealed the artist's sudden illness on Twitter.

The announcement surprised many fans since the news came after Yoon successfully finished the "Wednesday Project Vol. 8 Yoon Hyun Sang 'Lover'" to promote his recent mini-album.

Yoon is known from his participation in K-pop Star Season 1 but he officially debuted in 2014 with the EP album "PIANOFORTE." He has released about 13 albums. After his duet with IU on "When would it be," he started getting more acknowledgement and fame.

By Lee Han-na