The word: Grammy-winning folk rock duo Indigo Girls are known for their heartfelt and powerful style and political activism. Their self-titled album, "Indigo Girls," went platinum and received the Grammy award for Best Contemporary Folk Album in 1990. Since then, they've remained active, touring and releasing a total of 13 studio albums.
Details: 7:30 p.m. Tuesday at The Birchmere, 3701 Mt. Vernon Ave., Alexandria, Va. Tickets are $45 and are available at http://www.ticketmaster.com.