So what’s the difference between this and Ultrastar Deluxe? https://usdx.eu/. Source: over 1 year ago

UltraStar Deluxe is a good and free SingStar clone. You have to provide your own songs, though. Source: over 2 years ago

Https://usdx.eu/ - works, rather old, abandoned. Source: almost 3 years ago

Well, you have https://www.karaoke-forever.com/, which you could probably host and get setup or, if it's not as important for you to have it self-hosted to access everywhere but just "self-hosted" on a local machine, you have https://usdx.eu/, which I believe is the closest to what you will find of Singstar. Source: almost 3 years ago

Incompetech - Royalty free music by Kevin MacLeod. - Source: dev.to / 4 months ago

Soundtrack is by Myuu, Kevin Macleod, Fesliyan Studios, and Syrinscape. Source: 7 months ago

Incompetech.com - good variety of music by one person, free with attribution. Source: 11 months ago

It's on the video, but just to be clear, the music is 'Echoes of Time' by Kevin MacLeod, used under Creative Commons Attribution 4.0 licence, http://incompetech.com. Source: 11 months ago

The song is made by Kevin MacLeod and probably is on incompetech.com however I do not know the name. Source: about 1 year ago