Hollywood's Hottest Moms

New parents Nicole Richie and Joel Madden are rock and rollers, so it's no surprise they would be selective when it comes to lullabies for their daughter, Harlow Winter Kate Madden. The duo play CDs from Rockabye Baby, which produce baby-friendly versions of songs by Nirvana, Radiohead and The Cure.

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Lullaby Renditions of Nirvana from Rockabye Baby!, $15; at amazon.com.