Sheryl Crow found out in November that she has a brain tumor.  Thankfully it's benign.

Crow revealed the news to the Las Vegas Review-Journal, but says the tumor is nothing to worry about.  However, it has caused some memory loss.

According to The Boot,

"...at a concert nearly a month ago in Florida, where she forgot part of her classic hit, "Soak Up the Sun." She brushed it off and told concert goers, "I'm 50, what can I say? My brain's gone to (expletive)."

At least she hasn't lost her sense of humor! Crow was diagnosed with breast cancer in 2006 , but has been cancer free for more than five years.