UltraStar WorldParty

UltraStar WorldParty is a karaoke video game for PC, created by the UltraStar Spain community
This game is free, open source, similar to SingStar, in which you can play alone or up to 6 players, having to imitate the same tone of voice and timing as the artist's songs.
The songs can be downloaded from the official UltraStar Spain website or from other communities around the internet.