Sheryl Crow: 'The Best I've Felt in Years'

July 7, 2007 — -- Sheryl Crow is one of those celebrities who seem much the same onstage and off.

Many fans see the rocker from Kennett, Miss., as a down-to-earth girlfriend who's easy to relate to.

Many more women can relate to the 44-year-old now that she's a breast cancer survivor.

Crow told Diane Sawyer in an exclusive interview with "Good Morning America" that she's fully recovered and feeling great. "I actually feel the best I've felt in years," she said.

Crow was diagnosed with cancer in her left breast in February. It was a total surprise. She isn't a smoker and doesn't have a history of breast cancer in her family.

Luckily, the cancer hadn't spread to her lymph nodes. The singer underwent a lumpectomy and a course of radiation that wiped out the cancer.

"Radiation was all that was required. It was seven weeks, five days a week, and not kind of a long process. You'd go in -- and literally eight [minutes] or 10 minutes long," Crow said.

"But over a course of seven weeks, you become fatigued and the breast becomes tougher and more painful and looks sunburned. And mostly what I experienced was fatigue."

In many ways, Crow was lucky. Weeks before, she and her boyfriend of two years, cyclist Lance Armstrong, had announced their separation.

"I was tired a lot," she said. "And also I was going through, you know, obviously, the trauma that I was going through before I was diagnosed. And so, all of it culminated at the same time and really forced me to just work my way through all of it."

Crow said she talked to Dana Reeve, who died of lung cancer in March, and she told her the only way to go through grief was to grieve.

"And so. … That's just kind of what I did. I mean, I just sat with it and just worked my way through it."

She meditated and changed her diet.

"I kind of went into a full-on Eskimo diet, where I ate a lot of salmon. In fact, I'm salmoned out of my brains, but just really eating a lot of omega-six, instead of omega-three, and really green vegetables, just eating really clean, organic food. … Listen, I haven't had a doughnut in I can't remember when."