AUSTIN -- Sheryl Crow cut a deal with federal investigators for immunity in the investigation into Lance Armstrong's doping. That's the claim in a book by Wall Street Journal reporters.
They say Crow admitted going to Belgium in 2004 with Armstrong so he could combine a blood transfusion with banned substances to give him an advantage over other cyclists.
Armstrong admitted doping earlier this year.
He has been stripped of seven Tour de France titles and an Olympic medal.