Beyoncé's "Baby Boy" featuring Sean Paul leads Billboard's Hot 100 for the sixth-straight week. The track once again fends off the advances of "Stand Up," the Ludacris and Shawnna cut which holds

Beyoncé's "Baby Boy" featuring Sean Paul leads Billboard's Hot 100 for the sixth-straight week. The track once again fends off the advances of "Stand Up," the Ludacris and Shawnna cut which holds at No. 2. The latter remains the favorite in urban markets and is No. 1 on Billboard's Hot R&B/Hip-Hop Singles & Tracks chart for the second week in a row.

If Ludacris isn't able to overtake "Baby Boy" in crossover and mainstream markets with "Stand Up," he'll have another chance as a guest on Chingy's "Holidae In." Also featuring Snoop Dogg, the cut jumps 7-3 on the Hot 100. This ties the mark reached by Chingy's first single, "Right Thurr," which is currently No. 13.

Also reaching a new peak on the Hot 100 this week is 3 Doors Down's "Here Without You," up one to No. 5. This is the rock act's third top-5 single, following 2002's "Kyptonite" (No. 3) and this year's "When I'm Gone" (No. 4).

New to the Hot 100's top-10 this week is OutKast's "The Way You Move" featuring Sleepy Brown, which scoots 12-10. Close behind with a 25-15 gain is the duo's "Hey Ya!" Both singles are from OutKast's two-CD set "Speakerboxxx/The Love Below" (Arista), which collects a solo album each from the duo of Big Boi and Andre 3000.

The Hot 100's fastest-growing track at retail is Jagged Edge's "Walked Outta Heaven," up this week 17-14. But it's MercyMe's "I Can Only Imagine" that is the top-selling single in the U.S., according to Nielsen SoundScan, topping Billboard's Hot 100 Singles Sales chart for the fourth week in a row.

G-Unit, which consists of rappers 50 Cent, Lloyd Banks, Young Buck and the incarcerated Tony Yayo, has the fastest-growing track at radio on both the Hot 100 and the Hot R&B/Hip-Hop Singles & Tracks chart. On the Hot 100, the group's "Stunt 101" bolts 80-47 in its second week on the chart, and moves 27-21 on the urban tally. G-Unit's debut album, "Beg for Mercy," will be released Nov. 18 in the U.S. via Interscope.

Although not due until Nov. 28, Jay-Z's "The Black Album" (Def Jam), which he claims to be his last, already has two singles making noise on the R&B/Hip-Hop tally. "Change Clothes," produced by the Neptunes, debuts at No. 30, while "What More Can I Say" arrives at No. 48.

Michelle Branch owns the Hot 100's top debut this week with "Breathe." The cut arrives at No. 63, giving Branch her sixth entry on the Hot 100, including "The Game of Love" with Santana. "Breathe" is the second single from her Maverick album, "Hotel Paper." The set's "Are You Happy Now?" peaked at No. 16 in August.

Also making a notable debut on the Hot 100 this week is Linkin Park's "Numb" at No. 66. Over on Billboard's Modern Rock Tracks chart, the song is up 11-5, giving Linkin Park two cuts in the top-10. The act's "Faint" is at No. 6. A Perfect Circle's "Weak and Powerless" leads Modern Rock Tracks for the second week in a row, while Staind's "So Far Away" tops Billboard's Mainstream Rock Tracks tally for the 13th week.

Over on Billboard's Hot Country Singles & Tracks roundup, Australian Keith Urban snares his third No. 1 as his "Who Wouldn't Wanna Be Me" jumps 2-1. Last week's chart topper, Gary Allan's "Tough Little Boys," falls to No. 3.