서두원, 노기태 – 오빠가 미안하다
Track 01 from Single "오빠가 미안하다"
Release Date: 2010.11.26
서두원, 소냐 – 하얀 겨울 (우리의 소리를 찾아서 & 사랑은 연필로 쓰세요)
Track 02 from EP "복면가왕 23회"
Release Date: 2015.09.06
Be One with Kpop - with Lyric
Track 01 from Single "오빠가 미안하다"
Release Date: 2010.11.26
Track 02 from EP "복면가왕 23회"
Release Date: 2015.09.06
Track 02 from Album "Red Devil 5th 'We Are The Reds'"
Release Date: 2014.05.09