Despite the growing popularity of the debut single from newcomer Rihanna, Mariah Carey's "We Belong Together" sits on top of the Billboard Hot 100 again this week. The cut, which has held the post for

Despite the growing popularity of the debut single from newcomer Rihanna, Mariah Carey's "We Belong Together" sits on top of the Billboard Hot 100 again this week. The cut, which has held the post for eight non-consecutive weeks, also tops the Hot R&B/Hip-Hop Songs chart for an ninth and the Pop 100 for a third.

In addition, Carey has the Hot 100's top debut with "Shake It Off," which enters the chart at No. 66.

But making a serious bid for glory is Rihanna's "Pon de Replay," which makes a 5-2 move on the Hot 100 and advances 6-5 on the Pop 100. And while the cut is a ways off on the R&B/Hip-Hop tally, it bounds 66-33 there and is that chart's greatest airplay gainer.

On the Hot Digital Tracks list, "Pon de Replay" takes a three-position leap into the lead, bouncing Jessica Simpson's cover of "These Boots Are Made for Walkin'" to No. 2 after one week on top. On the Hot 100, "Boots" falls 14-20.

Locked at No. 4 on the Hot 100 but retaining its bullet is the Pussycat Dolls' "Don't Cha" featuring Busta Rhymes. The song is up one to No. 4 on the Pop 100 and holds at No. 3 on the Hot Digital Tracks chart. The title is new at No. 8 on the Hot Ringtones chart, where 50 Cent's "Just a Lil Bit" remains No. 1 for a fourth straight week.

Rapper Bow Wow scores the first top 10 Hot 100 single of his career with the 11-8 move of "Let Me Hold You" featuring Omarion. On the Hot R&B/Hip-Hop Songs chart, the song is stuck at No. 2 for a third week behind Carey's "Together."

Fat Joe's "Get It Poppin'" is also new to the Hot 100's top 10, making a 12-9 move. On the Pop 100, it's up 17-12, but slips 23-24 on the Hot R&B/Hip-Hop Songs list.

Among the cuts making big Hot 100 moves this week are Gorillaz' "Feel Good Inc." (43-25), Gwen Stefani's "Cool" (64-50), Ying Yang Twins' "Badd" featuring Mike Jones and Mr. ColliPark (72-59), 50 Cent's "Outta Control (Remix)" featuring Mobb Deep (96-67), David Banner's "Play" (90-68) and Rob Thomas' "This Is How a Heart Breaks" (95-70).

Also debuting on the Hot 100 this week is the Click Five's "Just That Girl" (No. 83), Relient K's "Be My Escape" (No. 88), Kanye West's "Gold Digger" featuring Jamie Foxx (No. 92), Damian "Jr. Gong" Marley's "Welcome to Jamrock" (No. 96), Jamie O'Neal's "Somebody's Hero" (No. 99) and Seether's "Remedy" (No. 100).

Despite making mainstream strides, the Seether cut weakens on the Mainstream Rock airplay chart, where it falls to No. 2 and loses the No. 1 crown after four weeks to the Foo Fighters' "Best of You." In addition to its 2-1 move there, the Foos' track notches its fourth week on top of the Modern Rock airplay list.

Toby Keith's "As Good As I Once Was" is No. 1 for a second straight week on the Hot Country Singles & Tracks chart while Shakira's "La Tortura" featuring Alejandro Sanz is No. 1 for a seventh non-consecutive week on the Hot Latin Songs chart.

After nine weeks at No. 2 on the Adult Contemporary airplay chart, Michael Buble's "Home" takes over the lead from Kelly Clarkson's "Breakaway," which falls into second place. It marks the end of a remarkable 20 week No. 1 run for the single, the third longest of all time on the chart behind "Drift Away" by Uncle Kracker featuring Dobie Gray (28 weeks) and Celine Dion's "A New Day Has Come" (21 weeks).