Week of August 1

Lots of hot movers this week including songs from Sheryl Crow ("Summer Day," 21-12), Macy Gray featuring Velvet Revolver ("Kissed It," 19-13), Gaslight Anthem ("American Slang," 20-14), Enrique Iglesias featuring Akon ("One Day at a Time," 23-18) and Scissor Sisters ("Skin Tight," 37-31) and three new songs in the Top 10. But to make room for all this movement, some songs had to fall -- and no song had a more dramatic fall this week than last week's No. 1. "Summertime" from Barenaked Ladies slipped all the way to No. 11. It's the first time that's happened since my weekly charts resumed in 2006. (Before that, it had only happened once -- when Billy Joel's "Pressure" dropped 1-12 the week of December 19, 1982.) This drop is a combination of pressure (no pun intended) from new songs rising into the chart's upper reaches and the Barenaked Ladies' song losing steam after taking 16 weeks to rise to the top.

At No. 1 this week with "Free," The Zac Brown Band become the second act to rebound to the top this summer; The Bird and the Bee's "Heard It on the Radio" did the trick a few weeks back.

Of the three debuts this week, two are follow-ups to No. 1 hits: Katy Perry goes solo this time with "Teenage Dream" at No. 36 while Lady Antebellum returns with "Our Kind of Love" at No. 39. The third debut is "Marilyn" from chart newcomers Larsen B. The band, from Hertfordshire, England, is named after a former Arctic ice shelf. The song is this week's iTunes free download, and it joins four former iTunes free downloads on the survey: Nikki Yanofsky's "Cool My Heels" at No. 2, Two Door Cinema Club's "Something Good Can Work" at No. 4, Gaslight Anthem's "American Slang" at No. 14 and Erik Hassle's "Hurtful" at No. 27.