(CBS/AP)-- Sheryl Crow has revealed that she has a benign brain tumor, but a rep for the singer says it's nothing to be alarmed about.

The 50-year-old told an audience about her condition at a recent concert, but her representative, Christine Wolff, said it's very common.

Pictures: Sheryl Crow

Wolff said Crow is doing great and is healthy and happy. The tumor is a meningioma, and it's typically benign and develops from the protective linings of the brain and spinal cord.

"I worried about my memory so much that I went and got an MRI. And I found out I have a brain tumor," Crow told the Las Vegas Review Journal. "And I was, like, 'See? I knew there was something wrong.'"

"I haven't really talked about it," she added. "In November, I found out I have a brain tumor. But it's benign, so I don't have to worry about it. But it gives me a fit."

Crow battled breast cancer several years back. She's currently on a nationwide tour.