Famous blues singer Etta James, who was admitted to a hospital in Southern California on Monday due to sepsis caused by urinary tract infection, is still under observation, according to her son.

Etta James is best known for her 1961 hit “At Last.” She won three Grammys and was an integral part of the rock ‘n’ roll scene in its early days. Now she is 73 years old.

She was diagnosed in 2009 with Alzheimer's disease and last year she was hospitalized because of the same blood problem.

The sepsis is a condition that involves the inflammation of the entire body. Etta also suffers from dementia, leukemia, kidney problems and other ailments.

It was a really bad infection, her son Sametto James said.

She's doing a little bit better, but she's not out of the woods quite yet, he said.