Two very different yet both enormously popular acts have unveiled new singles from their much anticipated new albums.

After the video for 'Hold It Against Me' was revealed a few weeks ago, Britney Spears has released the second single from her upcoming 'Femme Fatale' album, due on March 25th. Co-written by Ke$ha and produced by by Dr Luke & Max Martin, 'Till The World Ends' continues the recent resurgence of dance in pop music.

Meanwhile, Oxegen headliners Arctic Monkeys have returned with a new single, entitled 'Brick By Brick', video and all. Though no details of a follow up to 2009's brilliant 'Humbug' have been announced, one can only assume it's on the way.