Like other karaoke games, players would sing to the lyrics of the available songs and get scored based on their rhythm, however Sing Party permits multiple people to play along with the lead singing player.
The game includes a variety of different modes. In Party Mode, lead singers read the song lyrics on the Wii U GamePad, allowing them to face the other players, which represent the lead singers' audience, and the lead singers can move around the room instead of staring at the television screen. The other players joins in the fun by following the cues from the physical performance of the lead singers, singing the background vocals and dancing along with the moves shown on the television screen.
In Sing Mode, players can sing by themselves or as a duet with harmonies. As the song is performed, their vocal qualities are scored and evaluated on the TV in real time.
In Team Mode, players can split into two groups, which lets players face off against their musical rivals as they rotate through different game modes.
The following is a list of the 50 songs available in the game. Since Sing Party is online-enabled and connects to the Nintendo Network, Nintendo advertised releasing future songs as DLC in early 2013, though none was ever released.