Week of Aug. 16, 2009

After a few weeks in which only a few songs made significant moves, this week a logjam gives way in the Top 20, and eight songs move five or more positions up the chart. Last week's runner-up, Whitney Houston's "I Look to You," is this week's biggest mover, sprinting 21-9. Between last week's 17-point jump and this week's 12-point leap into the Top 10, that song is an odds-on favorite for No. 1 in the next few weeks.

Its neighbor, "Smile" from Uncle Kracker at No. 8, is also a good bet for a charttopper. Interestingly, the two songs are in the same key and, when played on an iPod with the five-second overlap feature, blend seamlessly from Houston to Kracker.

Among the debuts this week, two newcomers (Will Hoge at No. 40 and Gary Go at No. 38) are joined by a veteran Midwest band that hasn't had a chart hit in almost two decades. Cheap Trick last hit in 1990 with "Wherever Would I Be?" the No. 14 follow-up to its No. 1 hit "Can't Stop Falling Into Love." The band's latest hit, "Miss Tomorrow," comes in at No. 39.