Reba McEntire [ tickets ]'s "Reba Duets"--featuring the country singer's collaborations with acts including Kelly Clarkson, Rascal Flatts, Kenny Chesney [ tickets ], Justin Timberlake and Faith Hill--sold about 301,000 copies during its first week in stores, enough to debut at No. 1 on the US album chart.

McEntire beat out last week's No. 1 album, Kanye West [ tickets ]'s "Graduation," which sold about 226,000 copies during its second week out and slips to No. 2 on The Billboard 200. Rapper 50 Cent [ tickets ]'s "Curtis" falls from No. 2 to No. 3 on sales of 143,000, according to Billboard, which bases its album chart on Nielsen SoundScan retail reports.

Barry Manilow [ tickets ]'s "The Greatest Songs of the Seventies" moved 113,000 copies during its first week in stores, and checks in at No. 4. Kenny Chesney [ tickets ]'s "Just Who I Am: Poets & Pirates" moves down two notches to No. 5, on sales of 112,000 copies.

Rounding out the Top 10 are the "High School Musical 2" soundtrack, James Blunt [ tickets ]'s "All the Lost Souls," Chamillionaire [ tickets ]'s "Ultimate Victory," KT Tunstall [ tickets ]'s "Drastic Fantastic" and Twista [ tickets ]'s "Adrenaline Rush 2007."