Alicia Keys is No. 1 as she is

Alicia Keys and Radiohead swap places at the top of this week’s U.S. album chart, but it’s the soundtrack to indie-film-that-could “Juno” that’s making the biggest waves on the tally.

The soundtrack album jumps from its No. 8 post last week to No. 3, thanks to a 78% increase in sales, according to Nielsen SoundScan. It moved a total of 68,000 copies this week, bringing it to 143,000 copies sold so far.

Radiohead’s “In Rainbows” slips to No. 2 with sales of 69,000 copies. The album, online in October as a pay-what-you-will download, has sold a total of 191,000 copies since its CD release on Jan. 1.

In two weeks in stores, “In Rainbows” still has not sold what Radiohead’s last album, 2003’s “Hail to the Thief,” moved in its first week (300,000 copies).

Keys’ “As I Am” returns to No. 1 despite a decline in sales, selling 70,000 copies this week on a 38% dip in sales. That’s 10,000 copies more than the all-time low figure for a No. 1 album, which was posted during the same week last year by the “Dreamgirls” soundtrack.

This week’s top debut comes from electronic-tinged pop artists Sia, whose Starbucks release, “Some People Have Real Problems,” enters at No. 26 after selling 20,000 copies. Further down, English singer-songwriter Kate Nash lands at No. 36 with “Made of Bricks.”

todd.martens@latimes.com