LOS ANGELES (Reuters) - After selling 15 million albums worldwide and winning a Grammy over her 12-year career, Macy Gray has taken a break from singing her own songs to channel her unique raspy voice in a new direction - singing favorite tunes by other artists. "Covered" features 10 tracks of popular R&B, soul, rap and rock hits, including lead single "Sail," originally by electro-rock band Awolnation, a duet with Idris Elba on pop singer Colbie Caillat's "Bubbly," and an uptempo jazz-inspired rendition of Kanye West's "Love Lockdown. ...