"My Life" 50 Cent ft. Eminem and Adam Levine

50 Cent's career has been on life support ever since his rivalry with Kanye West ended in embarrassing defeat five years ago. Could Adam Levine be the one to finally revive his fortunes? The Voice mentor features on "My Life," the lead single from 50's upcoming fifth studio album, and a performance on last night's episode of the NBC hit helped this comeback track quickly shoot to #1 on iTunes. Whether that renewed success is sustainable is another question entirely. "Life" is a surprisingly compelling bit of candid self-doubt and frustration—including a spirited guest verse from 50's own mentor, Eminem—but it's saddled with a drab hook that won't demand much attention from audiences. B