Her debut album is also at No. 1
Duffy continued her chart dominance in the UK for another week as her single 'Mercy' remained top on the UK Top 40 for a fourth week, while debut album 'Rockferry' held off a new release fro OneRupublic on the album rundown.
The single remained top despite a new entry from Leona Lewis, although her Sport Relief charity single 'Better In Time' could only manage the number two spot.
H Two O's 'What's It Gonna Be' ft. Platinum was at three, OneRepublic's 'Stop and Stare' remained at four this week and Nickelback's slow-burning 'Rockstar' was this week's No. 5, while the Utah Saints' re-released 'Something Good '08' moved from 13-8.
Sugababes' new single 'Denial' was this week's biggest mover, jumping 19 places to No. 15, while other new entries in this week's Top 40 included tracks from Panic At The Disco, Hard-Fi, Foals and Elbow.
With Duffy still at No. 1 on the album charts, US band OneRupublic are forced to debut at No. 2 with 'Dreaming out Loud' this week, with Nickelback's 'All The Right Reasons' remaining at three.
Leona Lewis' 'Spirit' moved back up to this week's number four and AMy Winehouse's 'Back To Black' completed this week's Top 5.
The Temptations 'Classic Soul Hits' was a new entry at eight, with MGMT's 'Oracular Spectacular' new at 12. Further down the chart, Clannad, Young Knives, Hercules & Love Affair and Get Cape, Wear Cape, Fly all had new entries.
