The mountain hat will be on view at the Washington, D.C., museum through Oct. 26.
Plus, pics from Jennifer Lopez, Beyoncé, Big Sean and more.
Damon Dash and other music stars involved in lawsuits.
Music that should be made into movies.
Plus, pics of Rihanna, T.I., Amber Rose, La La Anthony and more.
Rick Ross, Action Bronson, Earl Sweatshirt and Tyler the Creator also set to hit the stage.