22:00Sian AndersonJamz Supernova sits in for SianBBC Radio 1Xtra Duration: 3 hours Wed 17th Dec 2014, 22:00 on 1xtraJamz Supernova sits in for Sian Anderson with the next generation of music.GenresMusicHip Hop, RnB & DancehallDancehallMusicHip Hop, RnB & DancehallGarageMusicHip Hop, RnB & DancehallHip HopMusicHip Hop, RnB & DancehallRnBBrandSian Anderson Source: BBC Online