Sheryl Crow -- I Have a Brain Tumor Sheryl Crow I Have a Brain Tumor Breaking News 6/5/2012 2:59 PM PT

Sheryl Crow just announced she has a brain tumor -- but the singer insists ... there's nothing to worry about.

50-year-old Crow told the Las Vegas Review Journal, "I worried about my memory so much that I went and got an MRI. And I found out I have a brain tumor ... but it's benign, so I don't have to worry about it."

You'll recall -- Sheryl choked on stage last month in Florida, forgetting the lyrics to one of her most famous songs. She said, "I'm 50 what can I say! My brain has gone to s**t!"

It's unclear if the incident was related to her brain tumor.

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The tumor is what's called a meningioma -- a growth that develops from the protective linings of the brain and spinal cord.

According to Sheryl's rep, it's a very common condition ... and the rock star is happy, healthy, and doing great. The rep didn't say if the singer plans to pursue surgery.

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It's not Crow's first cancer scare either -- Crow successfully battled breast cancer back in 2006.

We got Sheryl out just last week at LAX and she looked great.