The power of positivity is subjective when it comes to cancer survival. There are those who argue that keeping up a positive attitude puts too much pressure on cancer patients. I think it depends on who you are at the time of cancer diagnosis, and what your individual personality style is in facing adversity, that is far more relevant to being a survivor.

Last Wednesday, when the news broke that Farrah Fawcett had been diagnosed with cancer, she asked that her privacy be respected. As is the case with most celebrities, it was not likely to happen. We have seen almost constant coverage in the details of her cancer diagnosis and treatment, and the paparazzi have captured in photographs her every movement.

Late last March fans of rock legend and Aerosmith lead singer Steven Tyler became concerned over speculation that Tyler had been diagnosed with throat cancer. Even though the remaining Rockin' The Joint show dates were cancelled, everyone connected to Tyler assured the public the rumors were false. Steven Tyler did not have cancer. He was suffering from strained vocal cords and needed a rest.

At the time, bassist Tom Hamilton explained the cancelled shows by saying, "You know Steven. Anything worth doing, to him, is worth overdoing," in reference to the fact that the band had been touring more now than it did 10 years ago.

Unfortunately, several months later it was announced that Hamilton had been diagnosed with cancer.

While the rumors had quieted concerning Tyler's health, now and then something new would come to our attention that made us wonder if he was okay. A reader wrote in that he had seen Tyler at the oncology clinic at a hospital he was visiting. We kept that under our hat.

Last night, Tyler appeared on Access Hollywood and for the first time, publicly discussed his health. No, he was not diagnosed with throat cancer -- but he had faced a serious health crisis and decided to speak about it. Tyler said he had been fighting a secret battle with a silent killer -- Hep C. Diagnosed three years ago, he was told by his doctor, Deepak Chopra's brother, that it was time he sought treatment. Tyler agreed to undergo a year of chemotherapy with interferon. He stated it nearly killed him but managed to stay with it and complete treatment. Tyler had Hep C for many years, and was asymptomatic, which is typical.

During the interview, Tyler said, "Hepatitis C is the one that, of all the people in this room, at least three have it and don't know it." He would like to raise awareness about Hep C and mentioned he might appear on Oprah for that purpose. "It's one of those things people don't speak about it, but it is treatable."

Almost 4 million Americans, or 1.8 percent of the U.S. population, have been infected with hepatitis C virus (HCV); it is the most prevalent cause of chronic liver disease in the United States. 80 percent of those with Hep C have no symptoms. Chronic hepatitis C can cause cirrhosis, liver failure, and liver cancer.

If you missed the television Access Hollywood interview with Steven Tyler, the video segment of the program is available online here.

In an exclusive interview with ABC Good Morning America's Diane Sawyer, Sheryl Crow talks intimately about the heartbreak and anguish she was forced to deal with when diagnosed with breast cancer -- and at the same time -- the break up of her engagement to be married to Lance Armstrong.

When the subject of the break up with seven-time Tour de France champion Armstrong was brought into the conversation, and the rumor the end of the relationship coincided with her breast cancer diagnosis, Crow says,

"No. No. No, it was really, I mean, really difficult, you know, just really difficult for both of us. I'm not angry. I mean, honestly, I look at it, and I just know that I can't be angry at Lance for being who he is. You know, he's a great person." Armstrong is a testicular cancer survivor.

Crow talks about the initial diagnosis of breast cancer, the subsequent lumpectomy and the many tears. The exclusive interview will air on Thursday, July 6 and Friday, July 7. To watch a preview video of the ABC Good Morning America interview, go here.

UPDATE: For our posts on the two-part interview:
Part One: Sheryl Crow: We are fragile but we are also divine.
Part two: Sheryl Crow adopts Eskimo diet to fight breast cancer.

Despite a threatened lawsuit, The National Enquirer is refusing to back down from its exclusive cover story that Whitney Houston has a brain tumor and states they are standing by the story 100 percent. Meanwhile, multiple-Grammy winning singer Whitney Houston, and her representatives, are denying there is any truth to the rumor and are threatening the tabloid with legal action. Houston has suffered turbulent challenges both professionally and personally over the years, and has been the focus of more than one tabloid story concerning her alleged drug use, career and marriage. It would be sad if she indeed has a brain tumor, but considering the source of the news announcing such a diagnosis, it is difficult to know at this time how much truth there is to the story. Hopefully -- none.

When Aerosmith announced it was cancelling the remaining Rockin' The Joint show dates for the month, the rapid chatter of online rumor heard loudest was that the Bad Boy of Boston Steven Tyler had throat cancer - or bird flu - or both - depending on who was doing the talking.

A spokesperson for Tyler insists the cancer rumors are absolutely not true. Tyler's voice may be gone for now, but according to more informed sources, it is the result of strained vocal chords.

"You know Steven," bassist Tom Hamilton said. "Anything worth doing, to him, is worth overdoing." Hamilton also mentioned that the band is touring more now than it did 10 years ago.