Justin Bieber, "My World"
Fifteen-year-old pop sensation Justin Bieber's first Billboard Hot 100 single, "One Time," was an insanely catchy ode to young love that immediately won over fans. And so were his second, third and fourth. It's no wonder, then, that Bieber's debut album, "My World," sticks to the formula. His vocals are as boyish as they are disarmingly mature. With genuine swagger on the nimble R&B track "Bigger," Bieber sings, "I was a player when I was little, but now I'm bigger . . . and all the haters, I swear, they look so small from up here." The ballad "Down to Earth" (a song he co-wrote about his parents' separation) reveals a deeper side: "So we fight through the hurt, and we cry and cry and cry and cry/ Then we live and we learn, and we try." Judging by the delivery of those poignant lines, it's hardly a stretch to imagine Bieber racking up more hits in the next decade to come.-Monica Herrera