North Wales song-stress Duffy remains at Number 1 for the third straight week with her tune ‘Mercy’. Duffy is now set for a historic chart double as she has also release her debut album ‘Rockferry’ this week. If her sales continue at the pace they are being reported at then she will top both charts by this coming Sunday. This just continues the roller-coaster ride she has been on since appearing on Jools Holland’s show on New Years Eve. She has also confirmed her first festival appearance of the summer with her set to perform in Abersoch at Wakestock 2008.