Leona Lewis [ tickets ], a British singer who was discovered on Simon Cowell's UK television talent-search series "The X Factor," enters the US album chart at No. 1 with her debut set, "Spirit."

The album sold 205,000 copies during its first week in stores, and easily bests George Strait [ tickets ]'s "Troubadour," which falls to No. 2 on The Billboard 200 on sales of 59,000. Billboard bases its flagship album chart on Nielsen SoundScan retail reports.

Country crooner James Otto [ tickets ] debuts at No. 3 with his sophomore set, "Sunset Man," which sold 58,000 copies. The "NOW 27" multi-artist hits compilation sold 47,000 copies and dips one slot to No. 4, according to Billboard. R.E.M. [ tickets ]'s "Accelerate" slips one rung to No. 5 on sales of 46,000.

Filling out the bottom half of this week's Top 10 are the "Alvin and the Chipmunks" soundtrack, Ray J [ tickets ]'s "All I Feel," Rick Ross [ tickets ]' "Trilla," P.O.D. [ tickets ]'s "When Angels & Serpents Dance" and Danity Kane [ tickets ]'s "Welcome to the Dollhouse."