Week of February 13

Although the No. 1 song stays the same this week, lots of chart action in lower positions suggests a strong battle for the top in the near future. Moving more than five positions up this week's chart are the Zac Brown Band's "Colder Weather" (8-2), Melanie Fiona's "Gone and Never Coming Back" (21-9), James Blunt's "There She Goes Again" (26-10), Darius Rucker's "Southern State of Mind" (35-24) and Michael Jackson/Lenny Kravitz's "(I Can't Make It) Another Day" (36-30).

Among the debuts this week is "When You're Young," the first Top 40 hit for 3 Doors Down since "It's Not My Time" went to No. 23 in 2008. The group, originally from Mississippi, bubbled under with "Kryptonite" in 2000 but broke through the next year with "Be Like That" (No. 13 for three weeks in 2001).

Colbie Caillat enters one notch above 3 Doors Down, with "I Do" at No. 39. It's the first single from her third album; we'll see whether it follows the No. 1 trails of "Bubbly" and "Fallin' for You," the debut singles from Caillat's first two albums.

And Katy Perry has the final of this week's new entries. "Not Like the Movies" at No. 38 marks her first ballad hit after a string of midtempo and uptempo hits.