How would ‘American Idol’ champ Kelly Clarkson react if critics compare her to fellow warbler Mariah Carey, whose voice, it has been said, covers an impressive spectrum but lacks soul? “The people who said that must be tone-deaf,” she snapped to Lionel Seah of The Straits Times. “Mariah is an excellent writer and singer. I believe she doesn’t receive the credit she deserves.” Then comes the nub. “Not all critics will like me for who I am. They won’t tell it to my face but they’ll write about it. Anyway, critics don’t buy my album, fans do,” she rattles off. The writer portrays Clarkson as a diva with an attitude, which Clarkson’s handlers blamed on her being exhausted.