Week of Nov. 22

The dance music act Cascada, with lead singer Natalie Horler, notches its first No. 1 with "Evacuate the Dancefloor." The group had hit previously with remakes of "Truly Madly Deeply" and "Because the Night," but this original hit surpassed both of those to move 4-1 this week.

Michael Jackson continues his 10-notch-a-week pace, moving 40-30-20-10 the past month with "This Is It." Could this mean he's headed for the top next week?

Creed stalled out at No. 40 with "Overcome," the first single from the group's comeback/reunion album, "Full Circle." But the second single, "Rain," is doing much better, up 32-25 this week. In 2000, the group had back-to-back No. 1's with "Higher" (one week) and "With Arms Wide Open" (two weeks).

This week's three debut songs are led by Rihanna's No. 29 bow for "Russian Roulette," the first single from her new release "Rated R." Only five songs this year have debuted as high or higher, with four of those entering the week of April 11: Susan Boyle's "I Dreamed a Dream" (No. 23), Shinedown's "Second Chance" (No. 27), Keith Urban's "Standing Right in Front of You" (No. 28) and Chrisette Michele's "Epiphany (I'm Leaving)" (No. 29). The most recent was Jermaine Jackson's "Smile" from his brother's memorial service (No. 29, July 12). Interestingly, despite those high debuts, most of those songs did not go to No. 1. (Only the Shinedown and Urban tracks did.) We'll see how Rihanna fares in the weeks to come.