Sheryl Crow -- Chickens Out In Hyped-Up Lance Armstrong Interview

Sheryl Crow TOTALLY WUSSED OUT during her big highly-anticipated sit-down interview about the Lance Armstrong scandal ... because she didn't answer a single meaningful question.

Crow sat for the interview with Entertainment Tonight in order to address rumors she knew about Lance's illicit use of performance-enhancing drugs for years -- but the problem ... she didn't address anything.

Sheryl gave non-committal answers the whole time, saying she only caught "bits and pieces" of Lance's interview with Oprah -- yeah right -- and then made general comments about Lance's confession, like, "The truth shall set you free."

But when it came to the one question everyone wanted to know the answer to -- whether she kept Lance's doping a secret for all these years -- Sheryl told ET she did not want to comment, saying the story was about Lance ... not her.