Colbie Caillat, "All of You" (Universal Republic)
Michelle Obama's favorite rapper, Common, makes a guest appearance on Caillat's third album, which follows her chart-topping "Breakthrough." The singer told Billboard, "I still incorporate all the styles that I love that were on 'Breakthrough' and 'Coco,' but it's a new chapter. I've experienced more and I've written with new songwriters who are really talented . . . It's like a full-on summer album." She told Artisan News one of her favorites on the album has more of a "doo-wop/reggae kind of feel."