Lance Armstrong will make his expected doping admission on Monday during an interview with Oprah Winfrey, reports USA Today. An anonymous insider says Armstrong will not discuss specific events but will confess that he took illegal drugs to boost his performance throughout his cycling career, despite years of denials and attacks on his accusers. The interview gets taped Monday and airs Thursday on the Oprah Winfrey Network. The move raises a host of potential legal and financial issues for Armstrong, which might explain why he'll go light on the details. (More Lance Armstrong stories.)