By far the highest weekly sales tally of 2008 to date, it's almost as many copies as the rest of the Top 10 combined, and very nearly six times as many as Amy Winehouse's deluxe edition of Back To Black, which sells 31,118 copies as it slips 1-2.
Duffy is the ninth female solo artist to achieve a simultaneous number one single and album, putting her in the illustrious company of Barbra Streisand, Whitney Houston Mariah Carey, Celine Dion, Kylie Minogue, Beyonce and Leona Lewis, who have all done it once, and Madonna, who has achieved the double on three separate occasions. Some might say Rihanna belongs on the list too, as she topped the album chart with Good Girl Gone Bad and the single Umbrella at the same time last year - but the latter track also credits Jay-Z, spoiling her claim. As yet, no fame solo artist has managed to top the charts simultaneously with their debut single and album but Duffy and Leona Lewis both did it with their second single and debut album. Duffy's first single, of course, was the title track of Rockferry, which was issued on 7-inch and download last December, first charted in January and has spent the last 10 weeks on the Top 75, with a peak position of number 45.
Duffy's album is already number seven for the year, with sales of 184,010 (the discrepancy between this and its first week sales is explained by retailers jumping the gun and selling more than 100 copies of the CD prior to its official release date last Monday). She must be fancied to move to the top of the list a week hence, overtaking fellow 'new Amy' Adele, whose 19 leads the year-to-date standings with sales thus far of 230,368.
Despite Duffy's contribution, sales of albums fell considerably last week, as the Mother's Day effect worked its way out of the figures. Overall album sales fell 21.8% week-on-week to 2,147,149, and were 9% below same week 2007 sales of 2,357,183. The compilation sector was boosted more by Mother's Day and thus suffered a bigger decline last week, falling exactly 36% to 421,168, while artist album sales declined 17.4% to 1,725,981.
Alongside the four debuts, the only albums in the Top 40 artist chart to increase their sales week-on-week are Timbaland's Shock Value, up 45-26 with sales of 8,039 (+38.6%); and Cascada's Perfect Day, which climbs 50-35, selling 5,508 copies (+2.7%).
Duffy's strong debut at the top of the album chart takes some impetus away from her single Mercy but not enough to prevent it from earning an easy fourth week at number one. Duffy was runner-up to Adele in BBC 6 Music's Sound Of 2008 critics' poll but Chasing Pavements has thus far sold 200,055 copies in eight weeks, and is ranked fourth for the year, while Mercy has sold 215,731 copies - including 53,594 last week - and is now third, behind Nickelback's Rockstar (250,316) and Basshunter's Now You're Gone (305,375).
Duffy's nearest singles chart rival remains H Two feat. Platinum's What's It Gonna Be. Sales last week of 30,882 provide a third straight week at number two for the track. It's the second major success in the fast-growing bassline genre, and emulates the first, T2's Heartbroken, which spent three weeks at number two at the tail end of 2007.
Completing a static top three for the second week in a row, Nickelback's Rockstar sold 24,859 copies last week, a dip of just 5.9% on the prior frame.
Physical release usually gives a boost to singles but it didn't work out like that for OneRepublic, whose second hit, Stop And Stare climbed 9-8 last week but dipped 4.3% on sales despite being released on CD. Its unpredictable behaviour continues this week. Although sales of its CD format slide 78% to 3,457, its digital download gets second wind, registering an 84% improvement to 18,482. Overall sales of 21,939 are enough to boost the record 8-4. OneRepublic's debut hit Apaologize - with Timbaland - falls 22-25 this week, though its sales climb 3.7% to 6,850, taking its career aggregate to 373,416.