고은성 - Amar Pelos Dois [열린 음악회/Open Concert] | KBS 210418 방송

고은성 - L’Envie D’aimer (사랑하고 싶은 마음) [열린 음악회/Open Concert] | KBS 201025 방송

[ESP/ENG] Phantom Singer - Musica (Kwon Seokyoung & Ko Eunsung) (Paolo Meneguzzi)

Portugal win Eurovision for the first time - Eurovision 2017: Grand Final - BBC One

고은성 (Eunsung Ko) I'll never fall in love again- Tom Jones

Il Mondo | Film 'About Time' OST | 어바웃 타임 OST | 이동신

O Re Piya - Rahat Fateh Ali Khan - Performed by Seven Eyes (Live in Lutry)

Salvador Sobral plays "trumpet" during Eurovision rehearsal | "Amar Pelos Dois" Portugal 2017

권서경+고은성 - Shape Of My Heart [열린 음악회/Open Concert] | KBS 201025 방송

포레스텔라 - Hijo de la Luna (달의 아들) [열린 음악회/Open Concert] 20200524

HENRY 'Believer' Live in Melbourne

EXO CHEN & N.Flying HWE SEUNG sing “Ghost Town” by Benson Boone🎙| Secret Duet EP. 01

Salvador Sobral-Amar Pelos Dois-(lyrics+ english translation) {Eurovision Portugal 2017}

231210 Ko Eun Sung | My Way

[고화질] 조승우♠ - 서른즈음에♬ 이 영상은 못 참지,,, (열린음악회/Open Concert) by 플레이버튼 | KBS 091011 방송

[클린버전] 국가수ㅣ고은성 - My Heart Will Go On #국민가수수련원 TV CHOSUN 220203 방송

Bad Romance - Forestella [Immortal Songs 2] | KBS WORLD TV 220730

Phantom Singer . Si Tú Me Amas (Hpresso) (Il Divo)

Andrea Bocelli - Can't Help Falling In Love (Live From Lake Las Vegas Resort, USA / 2006)

220223 고은성(Eunsung Ko) - Yesterday once more