When you've sold 36 million albums, you can afford to reinvent yourself endlessly. But Norah Jones' blessing, or curse, is how she remains her imperturbably chill self in any of her guises, be it hip-hop soul diva (Q-Tip's "Life Is Better") or jilted lover drifting through an art film (My Blueberry Nights). For her fourth LP, her liveliest, she rolls with producer Jacquire King (Tom Waits, Modest Mouse) and hires feisty session men, including guitarist Marc Ribot and drummer Joey Waronker. The result is avant-roots music that rocks, albeit gently. The Fall's high point is "It's Gonna Be," which borrows its arena bounce from Gary Glitter's "Rock and Roll Part 2" but still makes you want to curl up with a toddy.