50 Cent's reign on the Billboard major charts continues. His long-running hit "In Da Club" hangs onto the No. 1 post on the Hot 100 for a ninth week, while his latest, "21 Questions," moves into the p

50 Cent's reign on the Billboard major charts continues. His long-running hit "In Da Club" hangs onto the No. 1 post on the Hot 100 for a ninth week, while his latest, "21 Questions," moves into the pole position on the Hot R&B/Hip-Hop Singles & Tracks tally and the Hot Rap Tracks chart. 50's domination relegates Sean Paul's "Get Busy" to No. 2 on all three charts.

The combination of the "American Idol" phenomenon and the country's craving for patriotic-inspired songs pays off with a No. 4 Hot 100 entry for "God Bless the U.S.A." as recorded by the second season "Idol" finalists. It's a big week for the Fox reality show as Kelly Clarkson, victor of the contest's inaugural season, tops The Billboard 200 with her RCA debut "Thankful."

"God Bless the U.S.A." is propelled to its No. 4 position by racking-up first-week sales of 101,000 copies in the U.S., according to Nielsen SoundScan. It's the first single to crack the six-digit sales mark since Clarkson's "A Moment Like This" sold 236,000 units and 146,000 units last year in its first and second weeks of commercial availability.

"God Bless the U.S.A." knocks Kid Rock's "Picture" featuring Sheryl Crow/Allison Moorer from the top of Billboard's Hot 100 Singles Sales tally. "Picture" had been the best-selling single in the U.S. for 12 weeks. While sales of that single continue to grow, the cut slips 7-9 on the Hot 100.

Justin Timberlake's "Rock Your Body" is new to the top-10 of the Hot 100 this week, earning an 11-10 boost due to increased airplay. "Rock Your Body" is Timberlake's third solo effort to reach the top-10, as both "Cry Me a River" and "Like I Love You" climbed to the upper echelon of the chart in recent months.

The Hot 100's fastest-growing track at radio is Lil' Kim's "Magic Stick" featuring the ubiquitous 50 Cent. The cut climbs 75-46 in its second week on the tally. On the Hot R&B/Hip-Hop Singles & Tracks chart, "Magic Stick" jumps 24-17.

Elsewhere on the Hot 100, R. Kelly's "Snake" featuring Big Tigger bolts 69-41. "Snake" also slithers 31-27 on the Hot R&B/Hip-Hop Singles & Tracks chart. Kelly's "Ignition" rests at No. 3 this week, and likely would have been a No. 1 single if 50 Cent hadn't held such tight control of the tally's top slot for more than two months.

Notable entries on the Hot 100 include Jennifer Lopez's "I'm Glad" at No. 64, Jason Mraz's "The Remedy (I Won't Worry)" at No. 70, Toby Keith and Willie Nelson's "Beer for My Horses" at No. 74, and Heather Headley's "I Wish I Wasn't" at No. 78.

Linkin Park and Audioslave continue to lead Billboard's rock airplay charts. Linkin Park's "Somewhere I Belong" fronts the Modern Rock Tracks tally for a fourth week, while Audioslave's "Like a Stone" leads the Mainstream Rock Tracks chart for a third week.

Darryl Worley's "Have You Forgotten?" is No. 1 on Billboard's Hot Country Singles & Tracks roundup for a fifth-straight week, once again fending off the advances of Kenny Chesney's "Big Star," which is steady at No. 2.