Kumyoung
optimistic originally performed by radiohead karaoke version
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- K-Pop Hits 2013 AUG Vol.2 (Karaoke Version)
- Best Of Bon Jovi (Karaoke Version)
- Best Of Justin Bieber (Karaoke Version)
- Best Of Linkin Park (Karaoke Version)
- Best Of Michael Jackson (Karaoke Version)
- Best Of Britney Spears (Karaoke Version)
- Best Of Avril Lavigne (Karaoke Version)
- Best Of LMFAO (Karaoke Version)
- Best Of Bruno Mars (Karaoke Version)
- Best Of Jason Mraz (Karaoke Version)
- Best Of Maroon 5 (Karaoke Version)
- Best Of Adele (Karaoke Version)
- Best Of Muse (Karaoke Version)
- Best Of Radiohead (Karaoke Version)
- Best Of Alicia Keys (Karaoke Version)
- Best Of Beyonce (Karaoke Version)
- Best Of KE$HA (Karaoke Version)
- Best Of Rihanna (Karaoke Version)
- Best Of Whitney Houston (Karaoke Version)
- Best Of Mariah Carey (Karaoke Version)