For a guy who rides a bike for a living, Lance Armstrong is one of the most over-exposed athletes on the face of the planet.

Yeah, he rides a bike better than anybody in the world, but that's beside the point.

Armstrong sold out when he started dating Sheryl Crow soon after dumping his wife, only to separate with the rocker a few months after announcing their engagement.

What is it about becoming famous that changes one's moral composition to the point of abandoning everything that once meant so much to him?

On his satellite radio program, a weekly self-indulgence fest, Armstrong played a song from Crow's Grammy-nominated album "Wildflower," called "Letter to God." He went on to say that Crow showed him "a love that I never knew."

Awww, isn't that sweet? I'm sure the ex-Mrs. Armstrong must be delighted to hear that, after staying by his side and raising his children as he pedaled around the globe. (Lance met his wife after his cancer treatments).

It's not surprising, however, that Armstrong leaves another woman on the side of the road (although the Grammy winner is hardly without prospects -- and we're not sure who dumped whom).

Most of our beloved celebrities can't stay in their respective relationships.

From the adorable Jamie-Lynn DiScala of "Sopranos" fame, to Jessica Simpson and Nick Lachey, to Richie Sambora and Heather Locklear, to Brad and Jen, to Charlie Sheen and Denise Richards — and you may recall Meg Ryan and Dennis Quaid — Hollywood is one big quickie for the rich and beautiful.

Marriage to them is something to make headlines with.

Yet nobody tsk-tsks the celebs who break up. In fact, we make excuses for their behavior.

A mother-in-law told Mrs. Grrr after watching the movie "Walk the Line" that because of the apparent chemistry between Johnny Cash and June Carter, portrayed so well by Joaquin Phoenix and Reese Witherspoon, "she couldn't blame them for getting together."

Hmmm. Does that mean that if her son-in-law co-hosted a show with Brooke Burke and, say, they had "good chemistry," that she'll be understanding when he splits up with her daughter? Hardly.

But that is the celebrity double standard, isn't it?

It's like the time I Grrr'd the practice of us little people making excuses for the poor behavior of the rich people around us by stating, "Yeah, but he or she is loaded."

"Boy, that Lance Armstrong is a real cad." Yeah, but he's loaded.

"Boy, that lady in the big house is mean to the neighborhood kids." Yeah, but she's loaded.

"Oprah Winfrey sure is full of herself." Yeah, but she's loaded.

Similarly, Brad Pitt leaves Jennifer Aniston for Angelina Jolie, and it's "who could blame him?"

I've long said that if Monica Lewinsky looked like Angelina Jolie, there would never have been an impeachment. Never. There's no way. Upon hearing the news that President Clinton dallied with Jolie — even if she were his intern — men and women everywhere would have said, "And?"

Think I'm wrong? Think again.

Where was the outlash against Armstrong when he dumped his wife? There was none. Not a peep. Why? Because he is an American hero. An "inspiration" to cancer survivors and athletes. And then the tabloids embraced his relationship with Crow, glossing over the fact that he was a cad. Why? Because he is a celebrity.

But now that he may have dumped a woman even more beloved than he is, the gloves will come off. And you know what? It's about time.

And with that, your Grrr! for today.

Click here for your Grrrs

Respond to Mike | Grrr! Lexicon

VIDEO: Watch Mike's "Real Deal" webcast.

PODCAST: Take The Grrr! Column with you. Paste the link below into cast aggregator.
http://www.foxnews.com/xmlfeed/podcasting/0,4369,92,00.xml