Hot Spot

The players form a circle.
One player goes into the middle of the circle and starts to sing a song and the others players try to join him. If one of the surrounding players happens to sing a song somehow related to the current one (in lyrics, melody, or mood, or a song he just has a association to) then that player replaces the player in the middle and starts to sing the new song.

Notes

Important: The game must be played rapidly. The singer in the middle can not have a hanger and should be replaced quickly.