“My life has been unstoppable,” says legendary soul singer Candi Staton, explaining the title of her 30th album, Unstoppable (Beracah/Thirty Tigers). “It’s been a wonderful life, but it hasn’t been a normal life. ”That’s putting it mildly. Over the course of her 50-year career, Staton has seen more than her fair share of highs and lows. She’s scored hits in every decade of that span, in styles ranging from R&B (“I’m Just a Prisoner” and her iconic cover of Tammy Wynette’s “Stand by Your Man”) to disco (the oft-covered “Young Hearts Run Free” and her song-stealing version of the Bee Gees’ “Nights on Broadway”) to electronic dance music (“Hallelujah Anyway,” “You Got the Love”). Along the way, she’s had more comebacks than a prize fighter, garnered four Grammy nominations, and won over generations of fans with her powerhouse voice and timeless songs.