Lady GaGa's "Just Dance" featuring Colby O'Donis (Interscope) started a second week as the U.K.'s No. 1 single yesterday (Jan. 18), while its parent album, "The Fame," debuted at No. 3 on the U.K. album chart.

Irish pop-rock band the Script returned to the albums summit with its self-titled debut for Phonogenic/Sony BMG. The set has so far yielded three U.K. top 40 hits in "We Cry," "The Man Who Can't Be Moved" and "Break Even." The debut was released last August and spent its first two weeks at No. 1, and returns there in its 23rd chart week.

Kings of Leon's "Only by the Night" (Hand Me Down/Sony BMG) fell back to No. 2 on the album chart, while Jason Mraz improved 22-11 with "We Sing We Dance We Steal Things (Atlantic/Warner Music), as his single "I'm Yours climbed 34-28. U.K. girl pop band the Saturdays' debut album, "Chasing Lights" (Fascination/Polydor/Universal) enjoyed a 36-14 climb as its latest hit single, "Issues," jumped 6-4.

Lady GaGa's singles success continued despite a strong No. 2 debut for Cleveland rap-electro artist Kid Cudi's "Day and Night" (Data), credited in its remix form to Kid Cudi vs. Crookers. There were also top 10 climbs for "Let It Rock (Universal Island) by Kevin Rudolf featuring Lil Wayne (10-5), Beyonce's "Single Ladies (Put a Ring on It) (Columbia/Sony BMG) (8-7) and Girls Aloud's "The Loving Kind (Fascination/Polydor/Universal), 29-10.

Lady Gaga also debuted at No. 30 on the singles chart with her scheduled follow-up to "Just Dance," "Poker Face."

Katy Perry is in a second week atop Eurochart Hot 100 Singles with "Hot N Cold" (Virgin/EMI), while Duffy's "Rockferry" (A&M/Universal) returned to the European Top 100 Albums summit in its 45th chart week.