Diamond wasn’t Brooke White’s best friend on “American Idol” Wednesday night.

The tearful the 24-year-old folkster from Mesa, Ariz., was eliminated as the Fox show trimmed the competition to the top four finalists.

On Tuesday’s show, aka Neil Diamond Night, White sang two songs by Diamond: “I’m a Believer” and “I Am ... I Said.” Simon Cowell called White’s first performance “a nightmare,” and, in a turnaround, heaped praise on her after her second act.

“This is the Brooke we like. Sitting behind the piano, singing a very good song,” the snarky judge said. “It wasn’t incredible, but it was a million times better than the first song. Well done.”

Syesha Mercado joined White in the bottom two on Wednesday.

The remaining “Idol” candidates are Mercado, David Archuleta, David Cook and Jason Castro.