Katy Perry is the first Eurochart Hot 100 Singles-topping artist of the new year, moving 2-1 with "Hot N Cold" (Virgin/EMI). AC/DC's "Black Ice" (Columbia/Sony BMG) leads European Top 100 Albums for a seventh non-consecutive week.

It's Perry's second Eurochart triumph, after "I Kissed A Girl" had ten weeks atop the pan-European singles survey between August and October. "Hot N Cold" has four European No. 1s to its name this week, moving 3-1 in Norway and 2-1 in Switzerland and holding at the top in Germany and Austria. It's also up 3-2 in Italy, 4-3 in the Belgian region of Wallony and 9-7 in the United Kingdom, where the track remains popular after reaching No. 4 before Christmas. Perry begins a North American tour Jan. 23, with a European leg starting in Stockholm Feb. 22.

AC/DC's album now has estimated worldwide sales of five million units, and moves 4-2 in Hungary while holding at No. 4 in Denmark. Sony Music Entertainment claims the veteran Anglo-Australian rock group is also the bestselling catalog act globally in 2008.

The U.K.'s best-selling album of last year, Duffy's "Rockferry" (A&M/Universal), makes a new surge up the weekly pan-European index, moving 12-2 in its 44th chart week. That's fuelled in part by a 6-3 climb in the U.K., where a deluxe edition has been available since late November, featuring a second disc of seven previously unavailable tracks. The album also holds at No. 2 in Denmark and jumps 13-6 in Greece. Worldwide sales of "Rockferry" are now north of 4.25 million, according to Universal.

Seal's "Soul" (Warner Bros.), which has steadily climbed Top 100 Albums since its November release, is up to a new peak, improving 4-3. The covers set is at No. 1 again in France and Wallony, up 6-4 in Switzerland and new at No. 7 in Greece. It's down 15-25 in the United Kingdom, but certified platinum there for shipments of 300,000 units.

Pink's "Funhouse" (LaFace/Sony Music Entertainment) spends its tenth consecutive week in the collective top ten, at No. 4, enjoying climbs of 7-2 in Switzerland, 7-4 in Austria and 5-4 in Germany. Take That's "The Circus" (Polydor/Universal) holds at No. 5 overall, spending a fifth week atop the U.K. survey with sales to last weekend of 1,493,000 units. It's also No. 1 again in Ireland.

Il Divo's "The Promise" (Syco Music/Sony Music Entertainment) falls 2-6 on the composite chart, despite a 25-2 charge in Norway, behind a 6-1 climb there by the Killers with "Day & Age" (Vertigo/Universal), which is up 8-7 overall on the European Top 100 Albums. "The Promise" falls 1-3 in Sweden and 3-5 in Portugal but holds at No. 2 in Holland, while "Day & Age" also moves 4-2 in Greece.

A new name appears on the top ten of Top 100 Albums for the first time, as Michael Hirte's "Der Mann Mit Der Mundharmonika" (Sony Music Entertainment) climbs 11-8. The 44-year-old harmonica player was the winner of the German series "Das Supertalent" in late November.

Rounding out the pan-European top ten, Kings of Leon's "Only By The Night" (RCA/Sony Music Entertainment) is up 14-10. The quartet's fourth album, which reached No. 2 in October, is back up 3-2 in the United Kingdom, where sales have reached 1,225,000 units. The band is also performing well with two singles, with the former U.K. No. 1 "Sex On Fire" up 13-3 in Finland and "Use Somebody" down 5-6 in the United Kingdom.

The big mover on the Eurochart Hot 100, soaring 66-8, is the U.S. smash "Just Dance" (Interscope/Universal) by Lady Gaga featuring Colby O'Donis. 40,000 downloads give it a U.K. debut of No. 3. Electronica star Gaga is also charting in Europe with another single, "Poker Face," which climbs 2-1 in Finland, holds at No. 2 in Norway and climbs 5-4 in Sweden.