Primarily associated with lesbians in North America, Europe, Australia, and New Zealand, lesbian culture has often involved large, predominantly lesbian "women's" events such as the Michigan Womyn's Music Festival (closed after 2015) and the Club Skirts Dinah Shore Weekend. Lesbian culture has its own icons, such as Melissa Etheridge, k.d. lang (butch), Ellen DeGeneres (androgynous) and Portia de Rossi (femme). Lesbian culture since the late 20th century has often been entwined with the evolution of feminism. Lesbian separatism is an example of a lesbian theory and practice identifying specifically lesbian interests and ideas and promoting a specific lesbian culture. Examples of this included womyn's land and women's music. Identity-based sports teams have also been associated with lesbian culture, particularly with the rise of lesbian softball teams and leagues in the 1980s and 1990s. Softball and other athletic teams created social community and allowed lesbians to reject social expectations of physicality, but were typically considered separated from lesbian feminism and political activism.