Via WERS.org:

88.9 WERS is proud to present a Wicked Good Festival, featuring FREE performances from Bleachers, Buffalo Tom, Juliana Hatfield, and Air Traffic Controller with even more still to be announced! Free and open to the public, this community event on Boston Common will be fun for the whole family. So plan to join us on August 18th for our first ever and totally FREE Wicked Good Festival – make sure to check back regularly for festival updates and additions to the lineup.