13:00Gemma CairneyRadio 1 TakeoverBBC Radio 1 Duration: 3 hours Mon 25th Apr 2011, 13:00 on BBC Radio 1 N. IrelandDr Who's Karen Gillan joins Gemma as 1Xtra's takeover of Radio 1 continues.GenresMusicPop & ChartEntertainmentBrandGemma Cairney Source: BBC Online