Bad Girls is the seventh studio album by American singer-songwriter Donna Summer, released on April 25, 1979, by Casablanca Records. Originally issued as a double album, Bad Girls became the best-selling and most critically acclaimed album of Summer's career (before the release of On the Radio: Greatest Hits Volumes I & II). It was also her final studio album for Casablanca Records. In 2003, Universal Music re-issued Bad Girls as a digitally remastered and expanded deluxe edition.