iSing
Best Karaoke social App. It covers English,Chinese,Thai,Portuguese,Japanese.
2 Alternatives To iSing
KaraFun
KaraFun is the best online karaoke. Over 35,000 karaoke songs, with studio quality, at home or on the go. Regular updates. Free demo!
PyKaraoke
PyKaraoke is a free karaoke player for Linux, FreeBSD, NetBSD, Windows, OSX and GP2X.