U.K. singer Rebecca Ferguson just released her debut album Heaven in the U.S., and the X Factor Season 7 runner-up recently stopped by the Rolling Stone studio to perform intimate versions of her single "Nothing's Real But Love," along with album tracks "Glitter & Gold" and "Shoulder to Shoulder."

"When I was on the X-Factor, I found that I grew a lot as a performer," says Ferguson. "I knew I could sing but I didn't believe in myself enough … I needed to hear that I was good."