Karaoke classic mode
This is a special mode which can be toggled in the settings.
In this mode, the engine doesn't immediately switch to the next song, but instead displays the wallpaper (or the user's avatar in full screen for maximum pixel overload) along with the name of the song to be played next, and the user's name who requested that song.
The user (and admin) would be the only one to be able to play the song, with a button on its mobile device.
This is similar to a karaoke box where everyone gets to choose a song and sing to it individually instead of everyone at once. There could be an automatic switch to the next song too (like 10 seconds or so)