This paper presents MoodifierLive, a mobile phone application for interactive control of rule-based automatic musicperformance. Five different interaction modes are available,of which one allows for collaborative performances with upto four participants, and two let the user control the expressive performance using expressive hand gestures. Evaluations indicate that the application is interesting, fun touse, and that the gesture modes, especially the one based ondata from free expressive gestures, allow for performanceswhose emotional content matches that of the gesture thatproduced them.