21:00On 1XtraHeavy hits & Throwbacks!BBC Radio 1Xtra Duration: 2 hours Sat 9th Apr 2011, 21:00 on BBC Radio 1 WalesThe hottest hip hop joints, mad exclusives and big dawg artists. Show more GenresMusicHip Hop, RnB & DancehallHip HopBrandOn 1Xtra Source: BBC Online