The "Blue Dress" refers to a famous blue dress worn by Monica Lewinsky during her affair with Bill Clinton, the 42nd President of the United States. The dress became a key piece of evidence in the investigation into Clinton's conduct, particularly during the impeachment proceedings in the late 1990s. The dress is notable for its role in the scandal, as it contained DNA evidence linking Clinton to Lewinsky. This connection played a significant part in the public and legal scrutiny surrounding the affair, making the dress a symbol of political controversy and media frenzy during that era.