It has to happen some time: Chris Daughtry fell out of the No. 1 slot in Billboard, but not by much.

Two debuts edged him: The Notorious B.I.G.'s Greatest Hits, which sold 99,000 copies, according to Nielsen SoundScan, and Arcade Fire's new Neon Bible (92,000). Daughtry sold 82,000, down 9% from the previous week; his total is 1.88 million.

Other American Idol album chart data follows:

• Carrie Underwood got a nice boost from her Idol performance last week, jumping from No. 15 to No. 12 on the chart and selling 45,000, a 33% improvement over the previous week. That was enough to push her over the 5 million mark (5.04 million, rounded), but she still trails Kelly Clarkson (who sold 3,900 copies last week) by about 700,000 for the all-time Idol album sales title.

• Katharine McPhee drops 44-61, selling 13,000, down 22%. Total is 248,000.

• Kellie Pickler is back down after her Idol boost, dropping 66-83 with 9,700 units sold, 19% off the previous week's sum. Her total is 464,000, maybe a month or a bit more away from the half-million mark.

• Fantasia Barrino drops 105-121, selling 6,900, a 14% reduction from the previous week. Total: 317,000.

• Taylor Hicks drops drastically, 109-136, selling 5,900, 20% fewer than in the previous week. Total is 653,000, but all signs point to it not going a whole lot higher.

• Off the chart: Ruben sold another 1,800, down about 14%, for a total of 213,000; and Clay Aiken sold 1,000, about the same as the previous week, to bring his total to 505,000.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.