Do we finally have an explanation of why Brad Pitt and Jennifer Aniston ended their marriage and why Lance Armstrong and Sheryl Crow broke up their engagement?

Yes. In an interview Sheryl Crow, now a best friend of Jennifer Aniston, reveals that when she found out that Brad Pitt was too close to Angelina Jolie, she ended the marriage. She realized that the two had very different ideas about how they planned to spend their lives. For similar reasons, Sheryl Crow also dumped Lance Armstrong.