The original "American Idol" was unable to beat another prepackaged pop star on the Billboard charts.
According to preliminary estimates, Cyrus' CD moved an impressive 326,000 units in its first weekend, bettering the 291,000 in sales for Clarkson's release.
The Cyrus album operates both as a sequel to the first "Hannah Montana" soundtrack, which moved 281,000 units last October, as well as the solo studio debut for Billy Ray Cyrus' 14-year-old daughter. The two discs contain 20 songs, half of which come from Cyrus' smash Disney Channel series.
The returns for Clarkson's new album were quite respectable given the waves of poor publicity that preceded its release. "My December" managed to top the first-week sales for Clarkson's smash "Breakaway" album despite early reports that RCA execs didn't like the material, as well as the cancellation of her summer tour.