Lance Armstrong closed his weekly satellite radio show on a bittersweet note by playing ex-fiancee Sheryl Crow's song "Letter To God." The seven-time Tour De France winner and the Grammy-winning rocker announced their breakup in a joint statement last week after "much thought and consideration," despite their "deep love and respect." Armstrong acknowledged the split in his Sunday night talk show, "Armstrong Radio," on the Sirius Satellite Radio channel "Faction," saying he was "torn it didn't work out." "Obviously, this week was a rough week for us, but that doesn't change the fact that Sheryl is an unbelievable lady, one...