"Baby Boy" from Beyoncé and Sean Paul hangs on for a fifth-straight week atop Billboard's Hot 100, fending off a threat from Ludacris' "Stand Up" featuring Shawnna. The latter jumps 4-2, a peak i

"Baby Boy" from Beyoncé and Sean Paul hangs on for a fifth-straight week atop Billboard's Hot 100, fending off a threat from Ludacris' "Stand Up" featuring Shawnna. The latter jumps 4-2, a peak it reaches in its ninth week on the chart. "Stand Up" has slightly better luck in pure urban markets, swapping places with "Baby Boy" on Billboard's Hot R&B/Hip-Hop Singles & Tracks tally with a 2-1 gain.

On crossover and mainstream radio, however, Beyoncé still reigns supreme, as "Baby Boy" leads the Rhythmic Top 40 chart, published by Billboard sister publication Airplay Monitor, for a sixth week in a row. The track has also had a hold on Billboard's Hot 100 Airplay chart for fifth-straight week.

Also making gains on the Hot 100 is "Damn!" from YoungBloodZ featuring Lil Jon, which is up 5-4, and Chingy's "Holidae In," which scoots 9-7. "Holidae In," featuring Snoop Dogg and Ludacris, is the Hot 100's fastest-growing track at radio, while Chingy's other top-10 single, "Right Thurr," drops one to No. 8.

OutKast's two-CD Arista set "Speakerboxxx/The Love Below" has spawned a pair of singles, and both are soaring up the Hot 100. While sold as a package, the new album collects a solo album each from the duo of Big Boi and Andre 3000. "The Way You Move," from Big Boi and Sleepy Brown, flies 21-12, while Andre 3000's "Hey Ya!" rockets 41-25.

Other tracks on the rise include Murphy Lee's "Wat Da Hook Gon Be" featuring Jermaine Dupri (46-31), Marques Houston's "Clubbin" featuring Joe Budden & Pied Piper (51-39) and Britney Spears' "Me Against the Music" featuring Madonna (50-43).

The Hot 100's top debut is No Doubt's Talk Talk cover "It's My Life," which arrives at No. 69. Other notable entries include Simple Plan's "Perfect" at No. 72, Chris Cagle's "Chicks Dig It" at No. 73, Montgomery Gentry's "Hell Yeah" at No. 74 and G-Unit's "Stunt 101" at No. 80.

MercyMe's "I Can Only Imagine" is the Hot 100's fastest-growing track at retail, bringing it a 77-71 boost. The cut has been the top-selling single in the U.S. for three weeks in a row, according to Nielsen SoundScan.

Over on Billboard's Modern Rock Tracks tally, A Perfect Circle snares its first No. 1 with "Weak and Powerless." The song moves 2-1, ending the 10-week run of Staind's "So Far Away." The latter, however, tops Billboard's Mainstream Rock Tracks chart for the 12th week in a row.

Gary Allan leads Billboard's Hot Country Singles & Tracks roundup for second week, once again edging out Keith Urban's "Who Wouldn't Wannna Be Me."