Does the world really need another CD version of Pet Sounds? In 1995, Capitol released a remastered deluxe edition of the Beach Boys' 1966 classic; two years later, the label put out The Pet Sounds Sessions, a three-CD, ninety-song box set containing alternate takes, instrumental tracks and the first true stereo mix of the landmark album. Now comes the 40th Anniversary Edition. The two-disc set offers yet another new mix of the album (this time in surround sound) as well as a DVD with about an hour's worth of footage — mostly cobbled together from previous Beach Boys documentaries. "Much has changed (for the better) since I did the stereo mix in 1996," writes producer Mark Linett in the liner notes. The album still sounds amazing, but unless you have a surround-sound stereo or the ears of the dogs barking at the end of "Caroline No," there's not much reason to buy this.

“I'm Yours”

Jason Mraz re-emerged after his disappointing second album with this lead single, a Jack Johnson-esque ditty about giving yourself fully to someone else. The success of the reggae-tinged song (it earned two Grammy nods and a spot on the Billboard singles chart for well over a year) was something the folk-pop singer never predicted when he wrote it in 15 minutes at home. "I played a happy-hippie chord progression that would probably work without 50 different Bob Marley songs," he told Rolling Stone. "I thought, 'It's too novelty. This is a nursery rhyme,'" concluding that "you can never guess what's gonna be a hit."